Faculty of Physics

Sukurta: 10 September 2013

ff9 Saulėtekio, LT-10222 Vilnius
Tel. 236 6001, fax 236 6003
E-mail:
http://www.ff.vu.lt

Dean – Prof. Habil. Dr. Vytautas Balevičius

STAFF

71 teachers (66 holding research degree), 54 research fellows (47 holding research degree), 92 doctoral students. 

 

RESEARCH AREAS

Solid State Physics and Technology
Spectrometric Characterization of Materials and Electronic/Molecular Processes
Laser Physics and Technology

DOCTORAL DISSERTATIONS MAINTAINED IN 2015

G. Batavičiūtė. New methods for quanttative evaluation of laser damage precursors.

V. Butkus. Decoherence and dephasing of vibronic excitons.

J. Chmeliov. Excitation evolution and self-regulation ability of photosynthetic light-harvesting systems.

E.Gabrytė. Applications of femtosecond laser pulses in refractive eye surgery.

K. Gulbinas. Photoelectrical and optical properties of indirect bandgap semiconductors TlGaSe2 and SiC.

S. Kazlauskas.  Charge carrier relaxation in fluorite-structured oxygen ion conductors.

Ph. de Meulenaer. The accuracy of integrated star clusters parameters. The effects of stochasticity.

T. Mineikis. Stochastic galaxy disk evolution. 2-D models.

V. Purlys. Three-dimensional photonic crystals: fabrication and applications for control of chromatic and spatial light properties.

T. Serevičius. Optimization of MOLECULAR emitters for new generation OLEDs.

L. Skardžiūtė. Tuning of the fluorescence properties of nitrogen heterocyclic compounds by polar substituents.

D. Ševčenko. Investigation of Defect-Related Luminescence of Isoelectronicaly Doped Zinc Selenide‑Based Scintillators.

A. Tekorius. Combined methods and instrumentation for dosimetric monitoring of the large fluence hadron irradiations.

 V. Venckutė. Investigation of the crystal structure, elemental composition and peculiarities of ionic transport in Li+ solid electrolytes.

A. Žukauskas. Fabrication of optical components for light control at micrometer scale by direct laser writing.

CONFERENCES ORGANIZED IN 2015

Functional Materials and Nanotechnologies 2015 (FM&NT-2015).

MAIN SCIENTIFIC ACHIEVEMENTS IN 2015

National Scientific Award of Lithuania in the field of Physical Sciences and Technology

D. Čiplys, R. Rimeika, V. Samulionis for the research  High Frequency Acoustic Waves in Ferroelectric Crystals, Wideband Semiconductors and Nanostructures.

The front end of CEP-stable 1 kHz repetition rate TW-class OPCPA system was developed at the laser facility Naglis.

Optical spectroscopic approach for chemical imaging of biological tissues was developed.

 

ASTRONOMICAL OBSERVATORY

29 M. K. Čiurlionio, LT-03100, Vilnius
Tel. 239 8764, fax 239 8767
E-mail:

Head – Prof. Dr. Vladas Vansevičius

STAFF

Professors: Prof. Dr. V. Vansevičius, Dr. A. Kučinskas.
Associate professors: Dr. J. Sūdžius, Dr. A. Bridžius, Dr. D. Narbutis.
Senior research fellows: Dr. S. Bartašiūtė, Dr. J. Sperauskas, Dr. L. Začs.
Research fellows: Dr. Ph. de Meulenaer, Dr. T. Mineikis.
Junior research fellows: V. Deveikis, S. Raudeliūnas.
Doctoral students: J. Bialopetravičius, Ph. de Meulenaer, T. Mineikis.

RESEARCH INTERESTS

Structure and evolution of galaxies
Star clusters and binary stars
Stellar photospheres

RESEARCH PROJECTS CARRIED OUT IN 2015

Projects Supported by University Budget

Stochastic Effects in Stellar Systems. Prof. Dr. V. Vansevičius. 2014–2018.

Main publications:

de Meulenaer, P., Narbutis, D., Mineikis, T., Vansevičius, V. 2015. Deriving physical parameters of unresolved star clusters. III. Application to M31 PHAT clusters. Astronomy and Astrophysics, 574, A66, 8 p.

Dobrovolskas, V., Kucinskas, V., Bonifacio, P., Caffau, E., Ludwig, H.-G., Steffen, M., Spite, M. 2015. Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars IV. Oxygen diagnostics in extremely metal-poor red giants with infrared OH lines. Astronomy and Astrophysics, 576, A128, 15 p.

de Meulenaer, P., Narbutis, D., Mineikis, T., Vansevičius, V. 2015. Deriving physical parameters of unresolved star clusters. IV. The M33 star cluster system. Astronomy and Astrophysics,  581, A111, 13 p.

National Research Projects

Project Development of the research infrastructure Molėtai Astronomical Observatory (RI MAO), VP2-1.1-ŠMM-06-V-01-013. Leader Dr. J. Sperauskas. 

 

MAIN R&D&I (RESEARCH, DEVELOPMENT AND INNOVATION) PARTNERS

Center for Physical Sciences and Technology (Lithuania)
National Astronomical Observatory of Japan (Japan)
University of Latvia (Latvia)
Valparaiso University (USA)
Yale University (USA)

OTHER SCIENTIFIC ACTIVITIES

Dr. S. Bartašiūtė –

  • editorial board member of the international journal Baltic Astronomy.

 

DEPARTMENT OF GENERAL PHYSICS AND SPECTROSCOPY

9 Saulėtekio, LT-10222 Vilnius
Tel. 236 6040, fax 236 6003
E-mail:

Head - Prof. Dr. Valdas Šablinskas

STAFF

Professors: Habil. Dr. V. Balevičius, Dr. V. Šablinskas, Habil. Dr. G. Niaura (part-time), Dr. V. Gulbinas (part-time).
Associate professors: Dr. V. Aleksa, Dr. A. Gruodis, Dr. A. Maršalka, Dr. F. Kuliešius, Dr. J. Čeponkus, Dr. V. Urbonienė, Dr. L. Juodis.

Lecturers: Dr. K. Aidas, V. Klimavičius, M. Pučetaitė.
Doctoral students: N. Karalius, J. Kausteklis, N. Kelminskienė, V. Klimavičius, K. Kristinaitytė, J. Lach, M. Pučetaitė, S. Tamošaitytė.

RESEARCH INTERESTS

Spectroscopy of atoms, molecules and condensed matter
IR, UV, Raman, NMR investigation of organic compounds of the organized structures in the liquid, solid phases and nano-crystals
Phase transitions and critical phenomena
Molecular interactions, hydrogen bonding, conformational analysis
Spectral markers in biological tissues and fluids
Matrix isolation FTIR spectroscopy

MAIN SCIENTIFIC ACHIEVEMENTS IN 2015

Optical spectroscopic approach for chemical imaging of biological tissues was developed

RESEARCH PROJECTS CARRIED OUT IN 2015

Projects Supported by University Budget

Spectroscopy of Molecular Processes in Biological and Mesoscopic Systems. Prof. V. Balevicius, Prof. V. Sablinskas. 2010–2015.

Diffusion and self-aggregation (micellization) processes of the neat 1-decyl-3-methyl-imidazolium chloride ([C10mim][Cl]) and its aqueous solutions have been studied using pulsed-field gradient 1H NMR. Differently from many RTILs those in the neat [C10mim][Cl] have been found to be perfect Arrhenius-type. This finding has been discussed in terms of the classification of compounds into 'fragile'-, 'intermediate'- and 'strong glass formers'.

Main publications:

Klimavicius, V., Bacevicius, V., Gdaniec, Z., Balevicius, V. 2015. Pulsed-field gradient 1H NMR study of diffusion and self-aggregation of long-chain imidazolium-based ionic liquids.  Journal of Molecular Liquids, vol. 210, p. 223–226.

Čeponkus, J., Jonušas, M., Cotter, C. P., Pučetaitė , M., Aleksa, V., Guirgis, G. A., Šablinskas, V. 2015. Structural studies of 1,1-dimethyl-2-oxy-1-silacyclohexane by means of matrix isolation infrared absorption spectroscopy. The Journal of Physical Chemistry A, vol. 119 (11), p. 2721–2726.

Matulaitienė, I., Pociūtė, E., Kuodis, Z., Eicher-Lorka, O., Niaura, G. 2015. Interaction of 4-imidazolemethanol with a copper electrode revealed by isotope-edited SERS and theoretical modeling. Physical Chemistry Chemical Physics, vol. 17(25), p. 16483–16493.

National Research Projects 

Research Council of Lithuania. Spectral Characterization of Silicon and Germanium Containing Functionalized Organic Cyclic Compounds. (MIP-071/2013). Assoc. Prof. V. Aleksa. 2013–2015.

Ab initio and DFT calculations were carried out for three newly syntesized Si containing organic compounds. The theoretical results were compared with experimental vibrational spectra. Geometrical parameters for three newly synthesized cyclic compounds were found.

European Social Fund Agency. Synthesis and Spectroscopical Characterization of Materials Important for Semiconductor- and Nano-Technologies. Prof. V. Sablinskas (No. VP1-3.1- ŠMM-08-K-01-004/KS-120000-1756). 2013–2015.

Some hydroapatites were synthesized and spectroscopically analyzed. Silver nanoprisms for enhancement of Raman signal were synthesized. It was found that the prisms give better enhancement than nanospheres and nanorods. 

Agency for Science, Innovation and Technology. Development of Spectroscopic UV-VIS-NIR Analyzers for Multiparameter Characterization of Dispersive Flows. (Nr. VP2-1.3-ŪM-02-K-04-063). Prof. V. Sablinskas.  2013–2015.

The analyzer for quantitative analysis of powdered mixtures was designed and prototype of such analyzer was constructed. The analyzer is based on ATR technique. It was found that sufficient reproducibility of results captured by the analyzer can be achieved when spectra of 16 or more independent samples are averaged.

Research Council of Lithuania. Spectroscopic Express Analyzer of Cancerous Tissue (No. SEN-15053). Prof. V. Šablinskas. 2015–2018. 

New spectroscopic method of characterization of cancerous kidney tissue was developed. Infrared waveguide based ATR sensor for spectroscopic in situ characterization of extracellular fluid was designed. Patent application for the sensor was prepared and submitted.

International Research Projects 

Research Council of Lithuania. Lithuanian - French project Study of Molecules with Internal Hydrogen Bond Isolated in Cryogenic Matrices (financed by project number TAP LZ1/2015). Assoc. Prof. J. Čeponkus. 2015–2016.

Studies of Acetylacetone molecule isomeration and interaction with water molecules were performed by the means of matrix isolation vibrational spectroscopy. Novel technique involving matrix isolation technique and Raman scattering spectroscopy was used to study of the title compounds.

Contractual Research 

MITA inovation cheque UV-VIS-IR and Raman Measurements of Polymeric Samples (Contract Nr. ŪST-(SPR-1306)-1/1).V. Balevičius.

COOPERATION

Institute of Physics (National Center of Physical and Technological Sciences) (Lithuania)
Technical Universities of Darmstadt and Dresden (Germany)
Paris Sud 11 University (France)
Institute of Bioorganic Chemistry of Polish Academy of Sciences, Poznan (Poland)
National Institute of Chemistry (Slovenia)
Copenhagen University (Denmark)
Lund University (Sweden)
Kiev University (Ukraine)
Belarus State University (Republic of Belarus)

OTHER SCIENTIFIC ACTIVITIES

Prof. V. Balevičius –

  • member of the international advisory board Horizons in Hydrogen Bond Research;
  • member of the international advisory board Nuclear Magnetic Resonance in Condensed Matter;
  • member of the advisory committee International School-Seminar of Galyna Puchkovska on Spectroscopy of Molecules and Crystals.

Dr. G. Dikčius –

  • ERASMUS coordinator for physics;
  • Vilnius university representative member for HOPE thematic network.

 

DEPARTMENT OF QUANTUM ELECTRONICS

10 Saulėtekio, LT-10222 Vilnius
Tel. 236 6050, 236 6005, fax 236 6006
E-mail:

Head - Prof. Habil. Dr. Valdas Sirutkaitis

STAFF

Professors: Habil. Dr. V. Sirutkaitis, Habil. Dr. R. Rotomskis, Habil. Dr. V. Smilgevičius, Dr. R. Gadonas, Dr. G. Streckytė, Dr. A. Dubietis, Dr. G. Valiulis, Habil. Dr. A. Piskarskas (emeritus), Habil. Dr. A. Stabinis (emeritus).
Chief research fellow: Dr. A. Varanavičius.
Associate professors: Dr. S. Bagdonas, Dr. A. Matijošius, Dr. O. Balachninaitė, Dr. V. Karenauskaitė, Dr. M. Vengris, Dr. V. Jarutis, Dr. A. Melninkaitis, Dr.V. Tamulienė, Dr. V. Kudriašov, Dr. A. Čiuplys (part-time), Dr. M. Barkauskas (part-time).
Senior research fellows: Dr. V. Vaičaitis, Dr. E. Gaižauskas, Dr. M. Malinauskas, Dr. R. Grigonis, Dr. R. Butkus, Dr. G. Tamošauskas.
Research fellows: Dr. D. Kaškelytė, Dr. M. Peckus.
Lecturers: J. Jurkienė, Dr. R. Butkus, Dr. G. Tamošauskas, Dr. D. Paipulas, Dr. R. Piskarskas, Dr. J. Galinis.
Doctoral students: A. Alesenkov, A. Baškevičius, G. Batavičiūtė, R.Budriūnas, S.Butkus, E. Gabrytė, N.Garejev, D.Gailevičius, M.Ivanov, T. Kudrius, M. Matulionytė-Safinė, L. Mažulė, K. Michailovas, I. Pipinytė, K. Redeckas, S. Rekštytė, T. Stanislauskas, P. Stanislovaitis, K. Stankevičiūtė, I.Stasevičius, K. Steponkevičius, T.Tičkūnas, J. Vengelis, V. Voiciuk, A. Žukauskas.
Head of the teaching laboratory: A. Čiburys.

RESEARCH INTERESTS

Study of interaction of high power ultrashort light pulses with transparent media

Development of effective light frequency convertors and light pulse sources with the duration of few optical cycles and stable carrier-envelope phase

Study of femtosecond light filaments and generation of supercontinuum in transparent dielectrics

Development of new technologies for biomedical and industrial applications based on specific interaction of ultrashort light pulses with matter, enabling high precision material processing and surface and bulk modification

Development of optical methods of biomedical diagnostics and extension of application areas

In vivo and in vitro studies of spectral and photophysical properties of biologically active molecules and nanostructures aiming at optimisation of therapy and diagnostics

Imaging and spectroscopy of biologic objects

Nonlinear optics of ultrashort pulses

Ultrafast spectroscopy of photoactive molecules, nanostructures and semiconductors

Laser surgery using femtosecond light pulses

Damage in bulk materials and coatings induced by femtosecond pulses

Optics characterization including reflection/transmission, scattering as well as absorption and laser-induced optical damage threshold in wide spectral range

Peculiarities of ultrafast exciton dynamics at reduced dimension in self-assembled molecular nanostructures and quantum dots

Laser submicro- and nanoscale engineering of functional 3D devices

High intensity ultrashort pulse generation by OPCPA systems

Time-resolved digital holography

Formation of the coherent light by the incoherent pump in the nonlinear crystals

Radial/azimuthal polarization beams, Bessel beams and optical vortices

MAIN SCIENTIFIC ACHIEVEMENTS IN 2015 

The front end of CEP-stable 1 kHz repetition rate TW-class OPCPA system was developed

Self-compressed CEP-stable spatiotemporal light bullets in solid state delectric media were experimentally demonstrated

Interaction dynamics of two copropagating femtosecond light filaments in sapphire crystal by means of time-resolved off-axis digital holographic and shadowgraphic microscopy is studied,

The creation of free-form polymer microoptics via ultrafast laser writing was developed

Femtosecond Stimulated Raman Spectroscopy system was developed for the study of structural photoinduced dynamics in molecules

The femtosecond laser processing techniques that improve cut quality and throughput of transparent materials were developed and implemented

Spectral and spatial properties of a third harmonic signal generated via noncollinear six-wave mixing in air have been significantly improved by using two crossed pump beams

RESEARCH PROJECTS CARRIED OUT IN 2015

Projects Supported by University Budget

Study of Fundamental Ultrafast Processes in Laser and Nonlinear Optical Systems. Prof. V. Sirutkaitis. 2013–2017.

Spectral and spatial properties of a third harmonic signal generated via noncollinear six-wave mixing in air have been significantly improved by using two crossed pump beams.

An experimental and numerical study of the laser-induced damage of the surface of optical material in the femtosecond regime was performed and involvment of different processes based on nonlinear ionization was estimated. 

Main publications:

Gražulevičiūtė, I., Šuminas, R., Tamošauskas, G., Couairon, A., Dubietis, A. 2015. Carrier-envelope phase-stable spatiotemporal light bullets. Optics Letters, vol. 40, p. 3719–3722.

Budriūnas,R., Stanislauskas, T.,Varanavičius, A. 2015. Passively CEP-stabilized frontend for few cycle terawatt OPCPA system. J. Opt., vol.17, 094008. doi:10.1088/2040-8978/17/9/094008.

Gaižauskas, E., Vaičaitis, V., Fedotova, O., Khasanov, O. 2015. Towards broadband terahertz generation due to coherent phonon–polariton excitations in centrosymmetric media. Optical materials express, p. 623–628.

Development of Laser Technologies for Industrial and Biomedical Applications. Prof. R. Gadonas. 2013–2017.

Studies on photostability, phototransformations and phototoxicity of nanoparticles in different biological environments were performed: modeling, formation and characterization of multifunctional and integrated microoptical components;

microstructuring of synthetic biopolymers for tissue engineering applications; development of novel additive manufacturing technologies for micro- and nanostructuring.

Main publications:

Damalakiene , L., Karabanovas, V., Bagdonas, S., Pupelis, L.,Valius, M., Rotomskis, R. 2015. Suppression of a specific intracellular uptake pathway by a saturating accumulation of quantum dots. J.Biomed. Nanotechnol., vol. 11, p. 841–853.

Matulionyje, M., Marcinonyte, R., Rotomskis, R. 2015. Photoinduced spectral changes of photoluminescent gold nanoclusters. J. Biomed. Opt., vol. 20, art. No.051018.

Zukauskas, A., Malinauskas, M., Brasselet, E., Juodkazis., S. 2015. 3D microoptics via ultrafast laser writing: miniaturization, integration and multi-functionalities. In Three-Dimensional Microfabrication Using Two- Photon Polymerization: Fundamentals, Technology, and Applications, Elsevier, Waltham, 268–292 pp. doi:10.1016/B978-0-323-35321-2.00014-5.

National Research Projects

Research Council of Lithuania. High Average Power <10 Fs Pulse Formation by Parametric Chirped Pulse Amplification Method (ČIPS) (No. MIP-056/2014). Dr. A. Varanavičius. 2014–2016. 

The experiments related to possible impact of thermo-optical effects in the OPCPA system that is devoted for characterization of ultrashort pulses were performed. The flat top pulse formation was investigated using cascade second harmonic generation and the pulses with intensity plato extending over ~100 ps temporal window were produced.

Research Council of Lithuania. Spatial Filters Based on Photonic Crystals for Improvement of Spatial Structure of Laser Beams (MIP-056/2014). Dr. M. Peckus. 2014–2016.

Photonic crystals for spatial filtering and for improving spatial quality of light beams are fabricated and investigated. A theoretical and experimental investigation of chirped axisymmetric photonic crystals was performed. A numerical optimization study of photonic crystals for spatial light filtering, based on genetic, conjugate gradient and gradual evolution approach optimization algorithms, was performed. This allows to archieve a larger angular range of the filtering lines as well as cleaner transmission spectra.

Research Council of Lithuania. Study of Optical Properties and Biocompatibility of Na(Gd/Y)F4 Nanoparticles (MIP-030/2014). Prof. G. Streckytė. 2014–2016.

Upconverting nanoparticles (UCNP) Na(Gd/Y)F4 were synthesized via coprecipitation and thermal decomposition methods. Distribution and intracellular uptake of UCNP into different degree of malignancy breast cancer cells MCF-7 and MDA-MB-231 as well as normal cell line MCF-10A was evaluated by XTT cell proliferation assay.

Research Council of Lithuania. Formation of Coherent Radiation in Nonlinear Crystals by Incoherent Pump (Kost). Dr. V. Tamulienė. 2013–2015.

Optical parametric amplification of a coherent signal beam by incoherent conical beams was investigated. It was found that the signal beam can be effectively amplified with an increment which is the same as in the field of a plane wave. The possibility to decrease the spectrum of the signal wave in the field of the incoherent pump when the so-called trapping regime is achieved was studied.

European Social Fund. Global grant measure: Complete Characterization of Ultrafast Nonlinear Light-Matter Interactions in Transparent Dielectrics in the Infrared Spectral Range (Grant No.VP1-3.1-ŠMM-07-K-03-001). Prof. A. Dubietis. 2013–2015.

Interaction dynamics of two copropagating femtosecond light filaments in sapphire crystal was studied by means of time-resolved off-axis digital holographic and shadowgraphic microscopy with 22 fs temporal and 1 μm spatial resolution. Fusion, splitting, and even suppression of the resulting plasma channels induced by interacting filaments was observed by varying time delay between the input pulses. Free electron channels were reconstructed in the form of the time-lapse movie with unprecedented spatial and temporal resolution.

Main publication:

Šiaulys, N., Melninkaitis, A., Dubietis. A. 2015. In situ study of two interacting femtosecond filaments in sapphire. Optics Letters, vol.40, p. 2285–2288.

Research Council of Lithuania. Research Council of Lithuania Healthy Aging Project: Fabrication of 3D Microstructured and Collagen Scaffolds with Chondrogenic Cells and Translational Application for Cartilage Regeneration (Regen) (SEN-20/2015). Prof. R. Mačiulaitis. 2015–2018.

The project started in October 2015. Creation of 3D microstructured polymeric scaffolds, their seeding with patient’s cells followed by implantation into live tissue is planned. Currently CAD modelling of the scaffolds and their fabrication experiments are being carried out. 

Research Council of Lithuania. R&D Project Two Channel Tunable Parametric Oscillator for Multiphoton Polymerization Technology: Test Application of Model and Prototype Creation (OPO4DLW) (TEC-05/2015). Prof. R. Gadonas. 2015–2016.

The project started in October 2015. Employment of tunable parametric oscillator for the optimization of the direct laser writing lithography is scheduled. Currently a study on polymerization mechanisms by varying exposure wavelength is performed.

EU funds Project: Use of Cells Programming and Tumor Microenvironment Control for Individualized Patient’s Therapy in Oncology (LASTER). (Grant No. VP1-3.1-ŠMM-10-V-02-027). Prof. R. Rotomskis. 2013–2015.

National Integrated Programmes project: Biotechnology and Biopharmacy: Fundamental and Applied Research (Grant No. VP1-3.1-ŠMM-08-K-01-005). Prof. R. Rotomskis. 2012–2015. 

Main publication:

Damalakienė, L., Karabanovas, V., Bagdonas, S., Pupelis, L., Valius, M., Rotomskis, R. 2015. Suppression of a specific intracellular uptake pathway by a saturating accumulation of quantum dots. Journal of Biomedical Nanotechnology, vol. 11, no. 5, p. 841–853. 

International Research Projects

7FP Project: Integrated European Laser Laboratories III (LASERLAB-Europe III). 2012–2015.

Three Joint Research Activities (JRA) are in action: Innovative radiation sources at the extremes (INREX); European Research Objectives on Laser for Innovation, Technology and Energy (EURO-LITE) and Laser and photonics for biology and health (BIOPTICHAL).

Project: Establishment of the Multi-Functional Laser Facility (NAGLIS) implemented under the Priority “Creation and development of the infrastructure of science and studies” of the Programme for Economic Growth (VP2-1.1-ŠMM-04-V), Dr. R. Butkus. 2010–2015.

The project funded by EU Structural Funds and Lithuanian State funds has been completed in 2015. A newly constructed laser facility “Naglis” is fully functional. Four laboratories are operating and carrying out research in the fields of laser nanophotonics, optical metrology, high energy optical parametric amplification and terahertz radiation generation.

Research Project: Singular Optical Fibers: the Fabrication and Application of the Angular Momentum Torque Control at a Microscale (funded by Lithuanian–French Programme Gilibert for Bilateral Cooperation (Research Council of Lithuania). Project leaders: Etienne Brasselet (France) and Mangirdas Malinauskas (Lithuania). 2015–2016. 

The research is dedicated to the creation of monolith components generating optical vortices: modeling, fabrication and characterization of such microdevices.

Research grant: Enhancement and Shaping of the Amplification Bandwidth in OPA through Implementation of Multibeam Pumping (funded by ELI-HU Nonprofit Ltd). Dr. R. Butkus. 2014–2015.

The research was focused on generation of broadband laser radiation in the short-wave infrared range and parametric amplification using two pump beams. Experimental results and recommendations were provided in a final research report and technical design report.

Taiwan-Latvia-Lithuania project: Mesenchymal Stem Cell and Cancer Stem-Like Cell Response to Nanoparticle Treatment (Grant No. TAP LLT 03/2014). Prof. R. Rotomskis. 2014–2016.

The goal of this project is to evaluate the response of mesenchymal stem cells and cancer stem-like cells to the nanoparticle and quantum dot treatment. During the join project new superparamegnetic nanoparticles and quantum dots coated by novel anionic or cationic biodegradable polymer will be created and tested for their biological effect in vivo and in vitro.

Main publications: 

Steponkiene, S., Dapkute, D., Riekstina, U., Rotomskis, R. 2015. Accumulation and distribution of non-targeted and anti-CD44-conjugated quantum dots in distinct phenotypes of breast cancer. Journal of Nanomedicine & Nanotechnology, 2015, 341, doi: 10.4172/2157-7439.1000341 

MAIN R&D&I (RESEARCH, DEVELOPMENT AND INNOVATION) PARTNERS

Svinburne University of Technology, Centre for Micro-Photonics (Australia)
UPC (Universitat Politechnica de Catalunya), Departament de Fisica i Enginyeria Nuclear (Spain)
Institut Fresnel-CNRS UMR 7249-Equipe ILM, Escole Centrale Marseille-Aix Marseille Universite (France)
Laboratoire des Solides Irradiés, Ecole Polytechnique, 91128-Palaiseau (France)
Light Conversion, Ltd. (Lithuania)
CNISM and Dipartimento di Scienza e Alta Tecnologia, University of Insubria, Como (Italy)
University of Patras, Physics Department, Laser, Nonlinear and Quantum Optics Labs (Greece)

OTHER SCIENTIFIC ACTIVITIES

Prof. V. Sirutkaitis –

  • member of Programe Committee (LPM) of the 7th international congress on Laser Advanced Material Processing (LAMP 2015), May 26–29, 2015, Kitakyushu, Fukuoka, Japan, (http://www.jlps.gr.jp/lamp/lamp2015/committee.htm);
  • member of International Program Committee of Pacific Rim Laser Damage: Optical Materials for High Power lasers 17–20 May, 2015, Shanghai, China, (http://pld15.csp.escience.cn/dct/page/70018);
  • member of academic program committee of international conference Northern Optics & Photonics 2015 (NOP2015) 2–4 June, 2015, Lappeenranta, Finland;
  • member of the Organising Committee of Lithuanian National Physics Conference, 17–19 June, 2015, Vilnius, Lithuania, http://lnfk.ftmc.lt/organizatoriai/.

Prof. R. Rotomskis –

Prof. A. Dubietis –

Dr. M. Malinauskas –

Dr. M. Vengris –

 

DEPARTMENT OF RADIOPHYSICS

9 Saulėtekio, LT - 10222 Vilnius,
Tel. 236 6080, fax 236 6081
E-mail  

Head - Prof. Habil. Dr. Jūras Banys

STAFF

Professors: Habil. Dr. J. Banys, Habil. Dr. J. Matukas, Habil. Dr. A. F. Orliukas, Habil. Dr. D. Čiplys, Dr. A. Kežionis, Dr. R. Grigalaitis, Dr. A. Lisauskas.
Associate professors: Dr. V. Kalesinskas, Dr. V. Samulionis,  Dr. V. Jonkus, Dr. M. Ivanov, Dr. R. Rimeika, Dr. V. Kunigėlis, Dr. M. Žilinskas, Dr. R. Sobiestijanskas, Dr. S. Pralgauskaitė,  Dr. E. Kazakevičius, Dr. T. Šalkus.
Lectures: Dr. K. Svirskas, Dr. R. Aleksiejūnas, Dr. Č. Pavasaris, Dr. R. Giriūnienė, Dr. K. Maknys, Dr. M. Ivanov, E. Palaimienė, Dr. S. Kazlauskas, Dr. V. Venckutė.
Research fellows: Dr. J. Macutkevič,  Dr. J. Vyšniauskas, Dr. S. Lapinskas, Dr. V. Kalendra, Dr. A. Džiaugys, Dr. A. Bernotas, Dr. Š. Bagdzevičius, Dr. S. Kazlauskas, Dr. V. Venckutė.
Engineering staff:  A. Sereika, V. Adomaitis, Dr. Č. Pavasaris, A. Cesiul, J. Glemža.
Doctoral students: J. Aleksandravičius, J. Belovickis, S. Daugėla, K. Ikamas, Dž. Jablonskas, S. Kazlauskas, I. Kranauskaitė, J. Krivochiža, R. Mackevičiūtė, E. Palaimienė, D. Petrulionis, A. Plyushch, Š. Svirskas, M. Šimėnas, V. Venckutė, I. Zamaraitė, J. Zdanevičius.

RESEARCH INTERESTS

Laboratory of Microwave Spectroscopy:

Broadband dielectric spectroscopy of ferroelectrics and related materials, relaxation and phonon dynamic studies in order-disorder ferroelectrics, ferroelectric ceramics, dipolar glasses, relaxors, composite systems, etc.

Technological processing of solid electrolyte ceramics

Broadband impedance spectroscopy of oxygen and lithium conducting solid electrolytes

RESEARCH PROJECTS CARRIED OUT IN 2015

Projects Supported by University Budget

Broadband Dielectric and Ultrasonic Spectroscopy of Innovative Materials. Prof. J. Banys. 2014–2018.

Dielectric and ultrasonic studies of various ferroelectrics, relaxor ferroelectrics, multiferroics, nanosized materials and inorganic and organic composites have been carried out. It was shown that in most cases interesting and important information can be extracted from these investigations for the fundamental understanding as well as for the possible applications in today’s and future advanced devices and/or technologies.

Noise Characteristics Investigation of Quantum Structure Devices Employed in Telecommunication Systems. Prof. J. Matukas. 2010–2015.

Investigation of low frequency noise and responsivity characteristics of CMOS transistor-based, also bow-tie asymmetric structure detectors for terahertz radiation has been carried out. The main noise origins in these structures are thermal channel noise and generation-recombination, also 1/f-type fluctuations.

Influence of aging processes to the noise and operation characteristics of the high-power light emitting diodes have been investigated. Degradation mechanisms of different parts of device have been evaluated.

Main publications:

Pralgauskaitė, S., Palenskis, V., Matukas, J., Glemža, J., Muliuk, G., Šaulys, B., Trinkūnas, A. 2015. Reliability investigation of light emitting diodes via low frequency noise characteristics Microel. Reliab., vol. 55(1), p. 52–61.

S. Pralgauskaitė, J. Matukas, A. Lisauskas, V. Palenskis, I, Kašalynas, L. Minkevičius, D. Seliuta, G. Valušis. 2015. Low frequency noise characteristics of bow-tie THz detectors based on InGaAs. IEEE Proc. Noise and Fluctuations (ICNF), p. 1–4.

Pralgauskaitė, S., Matukas, J., Grigalaitis, R., Banys, J., Zamaraitė, I., Vitajovic Petrovic, M.M., Bobic, J.D, Stojanovic, B.D. 2015. Low frequency noise characteristics of BaTiO3-NiFe2O4 composites at phase transition. IEEE Proc. Noise and Fluctuations (ICNF), p. 1–4.

Preparation and Physical Characterization of Solid Electrolyte Ceramics. Prof. A. F. Orliukas. 2011–2015.

The aim of the project was to study solid electrolyte ceramics with fast oxygen and lithium ion transport and to find the relation between their technological preparation conditions and physical properties. The two main tasks were: to sinter Li+-conducting NASICON, LTO and pyrophosphate ceramics and investigate ionic migration properties in the frequency range of 10 Hz – 3 GHz and 300 – 700 K temperature interval; to prepare oxygen ion conducting YSZ, ScSZ, GDC, SDC ceramics and to find relation between their preparation technological conditions and electrolytic properties.                                                        

Main publications: 

Orliukas, A. F., Fung, K.-Z., Venckutė, V., Kazlauskienė, V., Miškinis, J., Lelis, M. 2015. Structure, surface and broadband impedance spectroscopy of Li4Ti5O12 based ceramics with Nb and Ta. Solid State Ionic, vol. 271, p. 34–41.

Kežionis, A., Kazlauskas, S., Petrulionis, D., Orliukas, A. F. 2015. Relationship between charge carrier relaxation and peculiarities of electric response in some solid oxygen ion conductors. Solid State Ionics, vol. 279, p. 25–31.

Kazlauskas, S., Kežionis, A., Šalkus, T., Orliukas, A. F. 2015. Effect of sintering temperature on electrical properties of gadolinium-doped ceria ceramics. J. Mater. Sci. vol. 50, p. 3246–3251. 

Acoustic Investigations of Complex Structures. Prof. D. Čiplys. 2013–2017.

The propagation of Rayleigh and leaky surface acoustic waves in complex lithium niobate/tantalate based structures has been investigated. The role of acoustoelectric interaction on the nanofilm-coated piezoelectric crystal surface and at the crystal-liquid interface has been revealed.       

Main publications:

Rimeika, R., Čiplys, D., Shur. M. 2015. Acousto-optic diffraction by shear horizontal surface acoustic waves in 36 degrees rotated Y-cut X-propagation lithium tantalate. Acta Physica Polonica, vol. 127, no 1, p. 52–54.

Rimeika, R., Sereika, A., Čiplys, D., Sereika, R., Bondarenka, V., Shur. M. 2015. Acoustoelectric investigation of V2O5∙nH2O thin film transition from wet gel to xerogel. Journal of Non-Crystalline Solids, vol. 425, p. 24–27.

Electromagnetic Methods for Increasing Spectral Efficiency of Radio Communication Systems. Doc. K. Svirskas. 2014–2018.

Laboratory has acquired dedicated high performance server with 32 cores.

Researchers have developed a simulation framework for analysis of MIMO LTE network performance. It is based on a cloud-based virtual server and allows running massive Monte Carlo simulations of antenna analysis, radio propagation channel, radio interference estimation problems.

National Research Projects

Complex Investigations of Multifferroic Properties in Composites and Nanoceramics (VP1-3.1-ŠMM-07-K-03-011). Dr. R. Grigalaitis. 2013–2015.

Various types of multiferroic composites were investigated by the broadband dielectric spectroscopy. It was found that the synthesis method of the composite itself and even of its constituents makes a high impact on its low-frequency dielectric permittivity behaviour which is typically caused by Maxwell-Wagner-type relaxation processes in grain and inter-grain medium. Thus, the main factor influencing the electrical properties of core-shell composites is the structure and interfaces, instead of the constituent materials themselves.

Main publications:

Balčiūnas, S., Ivanov, M., Grigalaitis, R., Banys, J., Amorín, H., Castro ,A., Algueró M.  2015. Revisiting the broadband dielectric properties of high-sensitivity piezoelectric BiScO3–PbTiO3: Size effects. Physica Status Solidi B, p. 1–8.

Sakanas, R., Grigalaitis, J., Banys, J., Curecheriu, L., Mitoseriu, L., Buscaglia, V. 2015. Microstructural influence on the broadband dielectric properties of BaTiO3-Ni0.5Zn0.5Fe2O4 core-shell composites: Experiment and modeling. J. Appl. Phys., vol. 118, 174106. 

Research Council of Lithuania. Broadband Spectroscopy of Carbon Nanostructures and Ferroelectric Relaxors (VP 1-3.1-ŠMM-07-K-02-041). Dr. J. Macutkevič. 2012–2015.

The dielectric properties of composites filled with various nanocarbons inclusions and ferroelectric relaxors were investigated in very wide frequency range from Hertz to Terahertz.

Main publications: 

Kotsilkova, R., Ivanov, E., Bychanok, D., Paddubskaya, A., Demidenko, M., Macutkevic, J., Maksimenko, S., Kuzhir, P. 2015.  Effects of sonochemical modifications of carbon nanotubes on electrical and electromagnetic shielding properties of epoxy composites. Composite Science and Technology, vol. 106, p. 85–92.

Bellucci, S., Bistartelli, S., Cataldo, A., Micciula, F., Kranauskaite, I., Macutkevic, J., Banys, J., Volynets, N., Paddubskaya, A., Bychanok, D., Kuzhir, P., Maksimenko, S., Fierro, V., Celzard, A. 2015. Broadband dielectric spectroscopy of composites filled with various carbon materials. IEEE Transactions on Microwave Theory and Technique, vol. 63, p. 2024–2031.

Dziaugys, A., Macutkevic, J., Svirskas, S., Juskenas, R., Wencka, M., Banys, J., Motria, S. F., Vysochanskii, Yu. 2015. Maxwell-Wagner relaxation and anomalies of physical properties in Cu0.15Fe1.7PS3 mixed material. Journal of Alloys and Compounds, vol. 650, p. 386–392.

Operational programme for human resources development for 2001–2013 Priority 3: Strengthening Capacities of Researchers (VP1-3.1-ŠMM-07-K) Support to Research Activities of Scientists and other Researcher (Global Grant): Rectification by Plasma Waves in 2D Electron Gas and Its Application for Terahertz Detection (Nr. VP1-3.1-ŠMM-07-K-03-040). Prof. A. Lisauskas. 2013–2015.

Low frequency noise and responsivity characteristic of CMOS field-effect transistors (that will be used as detectors for fabrication of terahertz camera) investigation has been carried out. Low-noise readout electronics for the array of field-effect transistor based terahertz detectors has been designed and tested.

Main publications:

Palenskis, V. 2015. Transport characteristics of charge carriers in normal state superconductor YBa2Cu3O7-δ. World J. Condens. Matt. Phys., vol. 5, p. 118–128.

Zdanevičius, J., Bauer, M., Boppel, S., Palenskis, V., Lisauskas, A., Krozer, V., Roskos, H. G. 2015. Camera for high-speed THz imaging. J. Infrared, Millimeter and Terahertz Waves, vol. 36, p. 986–997, doi:10.1007/s10762-015-0169-1.

Lisauskas, A., Bauer, M., Ramer, A., Ikamas, K., Matukas, J., Chevtchenko, S., Heinrich, W., Krozer, V., Roskos, H. G. 2015. Terahertz rectification by plasmons and hot carriers in gated 2D electron gases. IEEE Proc. Noise and Fluctuations (ICNF), p. 1–5.

Interactions of Surface and Bulk Acoustic Modes and Applications for Sensors (No. MIP-057/2014). Prof. D. Čiplys. 2014–2015.

The novel techniques for characterization of thin films using surface acoustic waves and liquids using leaky acoustic waves in piezoelectric crystals have been demonstrated.

Main publication:

Rimeika, R., Sereika, R., Čiplys, D. Bondarenka, V. Sereika, A. Shur M. 2015. Contactless monitoring of conductivity changes in R. vanadium pentoxide xerogel layers using surface acoustic waves. Physics Procedia, vol. 70, p. 135–138.

Research project funded from the European Community’s Social Foundation (Grant Agreement No. VP1-3.1-ŠMM-08-K-01-004/KS-120000-1756): Synthesis and Characterization of New Materials for Semiconductor- and Nano-Technologies by Means of Continuous and Ultrafast Spectroscopic Methods. V. Šablinskas. 2012–2015.

Low frequency noise characteristic investigation of CoFe2O4-BaTiO3 and BaTiO3-NiFe2O4 ceramic composites has been carried out and physical processes during the phase transition were cleared up. Low frequency noise characteristics of modern optoelectronic devices (light emitting and laser diodes) have been investigated.

Main publications:

Pralgauskaitė, S., Palenskis, V., Matukas, J., Glemža, J., Muliuk, G., Šaulys, B., Trinkūnas. A. 2015. Reliability investigation of light emitting diodes via low frequency noise characteristics. Microel. Reliab., vol. 55(1), p. 52–61.

Pralgauskaitė, S., Matukas, J., Grigalaitis, R., Banys, J., Zamaraitė, I., Vitajovic Petrovic, M. M., Bobic, J. D., Stojanovic, B. D. 2015. Low frequency noise characteristics of BaTiO3-NiFe2O4 composites at phase transition. IEEE Proc. Noise and Fluctuations (ICNF), p. 1–4.

International Research Projects

Swiss-Lithuanian Ferroelectrics. From Controlled Internal Fields To Energy Harvesting / Medical Diagnostics / Microelectronic Applications SLIFE (CH-3-ŠMM-01/02). Prof. J. Banys. 2012–2016.

The main scientific interest in this project is oriented along two main directions: creation high-density charged/uncharged domains in single crystals and domain engineering in epitaxial thin films. The work is extended toward lead zirconate titanate and lead strontium titanate thin films with different substrates and bottom electrode layers.

Main publication:

Mackeviciute, R., Grigalaitis, R., Ivanov, M., Sliteris, R., Banys, J. 2015. Dielectric and pyroelectric properties of PMN-29PT single crystals near MPB. Ferroelectrics, vol. 479 (1), p. 29–34. 

Marie Curie Actions Project Fundamental and Applied Electromagnetics of Nano-Carbons FAEMCAR.  Prof. J. Banys. 2012–2016. 

In parallel to experimental research, theoretical models have been developed to understand the electromagnetic properties of nanocarbon-based composites. The outcome is a model able to describe the frequency-dependent dielectric permittivity of the composite materials. Once validated on experimental measurements, the models can be used to design the best possible composite of a family in view of a given electromagnetic response.

Main publications:

Bellucci, S., Bistartelli, S., Cataldo, A., Micciula, F, Kranauskaite, I., Macutkevic, J., Banys, J., Volynets, N., Paddubskaya, A., Bychanok, D., Kuzhir, P., Maksimenko, S., Fierro, V., Celzard, A. 2015. Broadband dielectric spectroscopy of composites filled with various carbon materials. IEEE Transactions on Microwave Theory and Technique, vol. 63, p. 2024–31.

Bellucci, S., Micciulla, F., Levin, V.M. Petronyuk, Yu.S., Chernazatonskii, L.A., Kuzhir, P.P., Paddubskaya, A.G., Macutkevic, J., Pletnev, M.V., Fierro, V., Celzard, A. 2015. Microstructure, elastic and electromagnetic properties of epoxy-graphite composites. AIP Advances 5, 067137.

Apanasevich, N., Sokal, A., Lapko, K., Kudlash, A., Lomonosv, V., Plyushch, A., Kuzhir, P., Macutkevic, J., Banys, J., Okotrub, A. 2015. Phosphate ceramic - carbon nanotubes composites: liquid aluminium phosphate vs solid magnesium phosphate binder. Ceramics International, vol. 41, p. 12147–52.

MSCA-RISE-2014: Marie Skłodowska-Curie Research and Innovation Staff Exchange Contractual Research project: Tuneable Multiferroics Based on Oxygen Octahedral Structures TUMOCS. Prof. J. Banys. 2015–2018.

The main objective of the project is development of new lead-free multiferroic materialshe for prospective application in forms of films and/or arranged layers in which the cross-coupling (magnetic-dipolar-elastic) can be tuned by both internal and external factors. It is to be achieved through preparation, investigation, and optimization of two kinds of Bi-containing oxygen-octahedral (BCOO) systems with paramagnetic ions involved: metastable perovskites and layered double hydroxides (LDHs). Advance in development of the BCOO multiferroics has potential market opportunities for R&D SME involved in this project.

International projects

Lithuanian-French Program Gilibert: Modern Detectors for Thz Radiation. A. Lisauskas. 2015–2016.

This project explores THz detectors which have the potential to enable a wide range of applications, from high-speed communications to imaging detector arrays and direct chemical sensing. It aims at both the improvement of the device all the way to its fundamental limits and to the exploration of modified detectors for chemical sensing.

MAIN R&D&I (RESEARCH, DEVELOPMENT AND INNOVATION) PARTNERS 

Rensselaer Polytechnic Institute (USA)
Lithuanian University of Educational Sciences (Lithuania)
Centre for Physical Sciences and Technology (Lithuania)

OTHER SCIENTIFIC ACTIVITIES

Prof. J.  Banys –

  • Chair of the international conference Functional Materials & Nanotechnologies 2015 (FM&NT-2015), http://http://www.fmnt.ff.vu.lt/.

Prof. D. Čiplys –

  • guest editor for a special issue of Acta Physica Polonica A Acousto-Optics and Applications 2014, vol. 127, no. 1, Warsaw, January 2015.

 

DEPARTMENT OF SEMICONDUCTOR PHYSICS

9 Saulėtekio, LT-10222 Vilnius
Tel. 236 6070, fax 236 6070
E-mail

Head – Prof. Habil. Dr. Gintautas Tamulaitis

STAFF

Professors: Habil. Dr. E. Gaubas (part-time), Habil. Dr. K. Jarašiūnas (part-time), Habil. Dr. S. Juršėnas (part-time), Habil. Dr. Ž. Kancleris (part-time),  Habil. Dr. V. Kažukauskas (part-time), Habil. Dr. E. Kuokštis, Habil. Dr. L. Subačius (part-time), Dr. V. Tamošiūnas, Habil. Dr. G. Tamulaitis (part-time), Dr. R. Tomašiūnas (part-time), Dr. G. Valušis (part-time), Habil. Dr. A. Žukauskas (part-time).
Associate professors: Dr. R. Aleksiejūnas (part-time), Dr. R. Butkutė (part-time), Habil. Dr. V. Gavriušinas (part-time), Dr. T. Malinauskas (part-time), Dr. S. Nargelas (part-time), Dr. S. Tamošiūnas (part-time), Dr. E. Žąsinas (part-time).
Lecturers: Dr. T. Čeponis, Dr. I. Kašalynas (part-time), Dr. A. Mekys (part-time), A. Arlauskas (part-time).
Research fellows: Dr. G. Liaugaudas, Dr. J. Mickevičius, Dr. J. Storasta (part-time), Dr. R. Pūras.
Doctoral students: P. Baronas, M. Černauskas, M. Dmukauskas, K. Gelžinytė, K. Gulbinas, J. Jurkevičius, D. Maželis, D. Meškauskas, K. Nomeika, J. Pavlov, A. Petrulis, Ž. Podlipskas, S. Raišys, I. Reklaitis, V. Rumbauskas, T. Serevičius, M. Skapas, L. Skardžiūtė, D. Ševčenko, A. Tekorius, A. Tuzikas, A. Vaitkevičius, A. Zabiliūtė-Karaliūnė.

RESEARCH INTERESTS 

Spectroscopic characterization of novel inorganic and organic semiconductor materials for optoelectronics
Optical nonlinearities in semiconductors caused by free carriers, electrooptic, and spin-related mechanisms
Dynamics of nonequilibrium carriers and excitons in highly excited semiconductors and their low-dimensional structures
Radiation detectors, high-density scintillation crystals
Applications of light emitting diodes
Computer simulation of crystal surface and defects
Bio-, Immuno-, DNA- sensors based on nanostructured conducting polymers
Determination of trace elements using atomic absorption spectrometric, spectrophotometric and kinetic methods

MAIN R&D&I (RESEARCH, DEVELOPMENT AND INNOVATION) PARTNERS

Center for Physical Sciences and Technology (Lithuania)
Rensselaer Polytechnic Institute, Troy, NY (USA)
Sensor Electronic Technology, Inc., Columbia, SC (USA)
National Taiwan University, Taipei (Taiwan)
Interuniversity Microelectronic Centre IMEC (Belgium)

OTHER SCIENTIFIC ACTIVITIES

Prof. E. Kuokštis –

Prof. G. Tamulaitis –

 

DEPARTMENT OF SOLID STATE ELECTRONICS

9 Saulėtekio, LT-10222 Vilnius
Tel. 236 6045, fax 236 6003
E-mail:

Head - Prof. Dr. Kęstutis Arlauskas

STAFF

Professors: Dr. K. Arlauskas, Dr. V. Karpus (part time).
Associate professors: Dr. M. Viliūnas, Dr. A.Poškus, Dr. V. Jankauskas (part time), Dr. R. Maldžius (part time), Dr. G.Sliaužys (part time).
Senior research fellows: Dr. K. Genevičius, Dr. N. Nekrašas, Habil. Dr., G. Juška, Dr. G. Sliaužys (part time), Dr. R.Purlys, Dr. R. Rinkūnas, Dr. V. Jankauskas (part time), Dr. R. Maldžius (part time), Dr. L. Tumonis.
Junior research fellows: B. Lenkevičiūtė, M. Stephen.
Doctoral students: A. Aukštuolis, R. Dobužinskas, T. Grigaitis, E. Kamarauskas, B. Lenkevičiūtė-Vasiliauskienė, A. Naujokaitis, J. Nekrasovas, V. Sabonis, M. Stephen, J. Važgėla. 

RESEARCH INTERESTS 

New Functional Materials and Structures

Features and modeling of charge carrier transport and recombination in disordered structures
Deposition technologies and investigation of non-crystalline, organic material and hybrid layers for organic electronics: solar cells, field effect transistors, organic light emitting diodes, X-ray sensors

Investigation of electrical and dielectric properties of paper of various technologies

Generation and transport of vacancies in crystalline silicon 

RESEARCH PROJECTS CARRIED OUT IN 2015

Projects Supported by University Budget

The Research of Charge Carrier Dynamics in Disordered Materials for Devices Applications.  Prof. K. Arlauskas. 2015–2016.

Fabrication and photoelectrical characterization of the perovskite solar cells with whole transporting materials synthesized in Kaunas University of Technology has been tested in perovskite solar cells made by one step and two steps routes. Due to the short lifetime of photogenerated charge carriers, the efficiency of solar cells was limited to 2%.

Main publications:

Ebenhoch, B., Thomson, S. A. J., Genevičius, K., Juška, G., Samuel, I. D. W. 2015. Charge carrier mobility of the organic photovoltaic materials PTB7 and PC71BM and its influence on device performance. Org. Electron., vol. 22, p. 62–68.

Lenkeviciute, B., Vitkus, M., Juska, G., Genevicius. K. 2015. Hybrid OLEDs with CdSSe1–x/ZnS core–shell quantum dots: An investigation of electroluminescence properties. Synt. Met., vol. 209, p. 343–347.

Zilinskaite, V., Gudeika, D., Grazulevicius, J. V., Volyniuk, D., Buika, G., Jankauskas, V., Juska, G., Rutkis, M., Tokmakov, A. 2015. Derivatives of indandione and differently substituted triphenylamine with charge-transporting and NLO properties. Dyes and Pigments, vol. 113, p. 38–46.

National Research Projects 

Research Council of Lithuania. Investigation of the Charge Carrier Transport Features in Thin Multilayered Hybrid Structures (MIP-091/2015). Dr. K. Genevičius. 2015–2018.

The aim of this project is further development the CELIV technique for the characterization of the charge carriers transport and recombination in hybrid structures. This technique will be suitable for optimization of the performance in the bulk heterojunction solar cells and OLEDs.

Research Council of Lithuania. Research of the Energy Levels and Charge Transfer Parameters of New Bipolar Organic Materials (MIP-107/2015). Dr. V. Jankauskas. 2015–2018.

This project focuses onto improvement of estimation of HOMO and LUMO levels of organic materials with higher work function (up to 6 eV) and research of energy levels and charge transport properties of such new materials. 

Research Council of Lithuania. Influence of Nano-Morphology on Charge Carrier Dynamics (VP1-3.1-ŠMM-07-K-01-023) Prof. G. Juška. 2011–2015.

This project focuses on charge carriers transport and related phenomena (efficiency of photo-generation, mobility of the charge carriers, recombination, trapping and etc.) in nanostructured organic materials for improving performance of Solar cells and field effect transistors.

International Research Projects 

FP7 ITN Marie-Curie: Ensuring Stability in Organic Solar Cells - ESTABLIS. 2011–2015.

This project will train 4 postdocs and 11 PhD students to develop the materials and techniques required to give cheap organic solar cells 10 year stabilities. Scientific objectives are: production materials with increased stabilities, clarification of photo(chemical) and mechanical degradation pathways, manufacturing organic solar cells with reduced inter-layer contaminations and increased inter-facial adhesion. Industrials partners: Belectric, Heraeus, Merck.

Contractual Research 

Contract No. BS-12000-1469 with company BASF Schweiz AG Measurements of Physical Data of Organic Molecules.

MAIN R&D&I (RESEARCH, DEVELOPMENT AND INNOVATION) PARTNERS 

School of Chemistry and Molecular Biosciences, Centre For Organic Photonics and Electronics (COPE), University of Queensland (Australia)
Thunder Bay Research Institute, Thunder Bay (Canada)
Lappenranta University, Lappenranta (Finland)
Stora Enso Oyj, Helsinki (Finland)
BASF Schweiz AG (Switzerland)

OTHER SCIENTIFIC ACTIVITIES

Prof G. Juška –

  • editorial board member of theLithuanian Journal of Physics.

 

DEPARTMENT OF THEORETICAL PHYSICS

9 Saulėtekio, LT-10222 Vilnius
Tel. 236 6030, fax 236 6003
E-mail:

Head – Prof. Habil. Dr. Leonas Valkūnas

STAFF

Professors: Prof. Habil. Dr. L. Valkūnas (part-time), Prof. Habil. Dr. K. Pyragas (part-time), Prof. Dr. D. Abramavičius, Prof. Dr. E. Anisimovas.
Associate professors: Doc. Dr. J. Bučinskas, Doc. Dr. J. Šulskus, Doc. Dr. K. Glemža, Dr. T. Gajdosik, Dr. G.Trinkūnas, Doc. M. Mačernis.
Lecturers: Dr. O. Rancova, Dr. V. Balevičius, Dr. S. Toliautas, Dr. V. Butkus, Dr. J. Chmeliov.
Doctoral students: V. Abramavičius, V. Butkus,  J. Chmeliov, V. Chorošajev, V. Dūdėnas, A. Gelžinis, S.Malickaja, A. Stepšys. 

Processes Modeling Laboratory at the Department of Theoretical Physics 

Head – Dr. Mindaugas Mačernis

RESEARCH INTERESTS

Development of exciton theory and its application to the nonlinear spectroscopy of molecular complexes

Non-equilibrium excitation dynamics in complex molecular systems and nanostructures in a broad temperature range

Coherent control and optimization of nonlinear optical signals of bio molecules and nano-systems

Development of the theoretical background of multi-dimensional spectroscopy of molecular complexes

Modelling of single molecular spectra of complex systems

Development of quantum mechanics and quantum electrodynamics for characterization of transitions in atoms, molecules and molecular complexes

Application of high performance parallel computing in theoretical modeling of processes in photoactive organic materials and nanosystems

Models of radiative neutrino masses

RESEARCH PROJECTS CARRIED OUT IN 2015

Project Supported by University Budget

Modeling of Processes in Photoactive Organic Materials and Nanosystems. Prof. L. Valkūnas. 2011–2018.

Theoretical background for studies of the energy transfer processes and coherent phenomena was devolped and used by investigating one-colour and two-colour two-dimensional electronic spectroscopy of various photosynthetic pigment-protein complexes. Theoretical analysis of the excitation transfer and relaxation pathways in the light-harvesting compelxes of photosystem II (LHCII) from plants was carried out on the basis of the structural data.

Main publications:

Petrov, E. G., Robert, B., Lin, S. H., Valkunas, L. 2015. Theory of triplent excitation transfer in the donor-oxygen-acceptor system: application cytochrome b6f. Biophys. J., vol. 109, p. 1735–1745.

Gelzinis, A., Abramavicius, D., Valkunas, L. 2015. Absorption lineshapes of molecular aggregates revisited. J. Chem. Phys., vol. 142, 154107.

Gruber, J. M., Chmeliov, J., Krüger, T. P. J., Valkunas, L., van Grondelle, R. 2015. Singlet-triplet annihilation in single LHCII complexes. Phys. Chem. Chem. Phys., vol. 17, p. 19844–19853.

National Research Projects

Research Council of Lithuania. Dynamics of Photoinduced Processes in Proteins and Model Systems (No: MIP-080/2015). Prof. L. Valkunas. 2015–2018.

The optical transitions in the chromophoric groups or in pigment molecules play the role of trigger in determining activity of proteins they are embeded. Studies of the processes taking place in photosystem II of plant photosynthesis, in bacteriorhodopsin and various opsins, the structural data of which are well defined, are carried out.

Research Council of Lithuania. Modeling and Controling of Exciton Quantum Dissipative Dynamics in Molecular Nanostructures (VP1-3.1-ŠMM-07K-01-020). Prof. D. Abramavičius. 2011–2015.

Exciton relaxation dynamics was described in a range of molecular and semiconductor systems. Modern experimental observables, e. g. coherent multidimensional spectra, were simulated to confirm the predictions of dynamics. Research yielded strong signatures of electro-vibrational interactions in molecular systems. In rigid molecular nanotubes weak exciton-exciton interactions were discovered. Analysis of the two dimensional coherent spectra was performed for low temperature conditions to demonstrate that vibrational resonances are clearly resolved in various dimensions in multidimensional signals.

Main publication:

Rancova, O., Jankowiak, R., Abramavicius, D. 2015. Probing environment fluctuations by two-dimensional electronic spectroscopy of molecular systems at temperatures below 5 K. J. Chem. Phys., vol. 142, 212428.

Research Council of Lithuania. Development of Simulation Approaches for Coherent Time-Resolved Spectroscopy of Photoactive Molecular Systems (MIP-090/2015). Prof. D. Abramavičius. 2015–2018.

The project was started in April 2015. Excitation dynamics in strongly conjugated molecules was targeted initially. Carotenoid dynamics was described using vibrational excitation intramolecular relaxation approach. We have successfully described the pump-probe experiment. Range of spectroscopy tools for nonlinear optical responses was extended by suggesting an auxiliary time-resolved fluorescence. It provides the most-available information that can be achieved in fluorescence measurements. These tools were applied for a realistic ring-like molecular system LH2.

Main publications:

Balevičius,V., Valkunas, L., Abramavicius, D. 2015. Modeling of ultrafast time-resolved fluorescence applied to a weakly coupled chromophore pair. J. Chem. Phys., vol. 143, 074101.

Balevičius, V., Pour, A. G., Savolainen, J., Lincoln, C. N., Lukeš, V., Riedle, E., Valkunas, L., Abramavicius, D., Hauer, J. 2015. Vibronic energy relaxation approach highlighting deactivation pathways in carotenoids. Phys. Chem.Chem. Phys., vol. 17, 19491.

MAIN R&D&I (RESEARCH, DEVELOPMENT AND INNOVATION) PARTNERS

Center of Physical Sciences and Technology (Lithuania)
University of California, Berkeley, and University of California, Irvine (USA)
University of Michigan, Ann Arbor (USA)
Queen Mary University, London (UK)
Institute of Physics of Charles University (Czech Republic)
Institute of Solid State Physics, University of Latvia (Latvia)
Riga Technical University (Latvia)
Free University of Amsterdam (Netherlands)
Free University of Brussels (Belgium)
Lund University (Sweden)
Nuclear Research Centre, Saclay (France)
State key laboratory of supramolecular structure and materials, Jilin University (China)
Dalian Institute of Chemical Physics, Chineese Academy of Sciences (China)
University of Antwerp (Belgium)
University of Würzburg (Germany)
Vienna Technical University (Austria)
Institut de Biologie et de Technologie de Saclay, University Paris Sud, Gif sur Yvette (France)
N. Bogolyubov Institute for Theoretical Physics, Ukrainian Academy of Sciences (Ukraine)

Other scientific activities

Prof. L. Valkūnas –

  • member of the Lithuanian Academy of Sciences;
  • editorial board member of the Lithuanian Journal of Physics;
  • vice-president of the Lithuanian Physics Society.

Prof. K. Pyragas –

Prof. D. Abramavičius –

  • member of the American Physical Society.

Assoc. Prof. T. Gajdosik –

  • member of the Austrian Physical Society.