Prof. Giedrius Janušas Profile

Prof. Giedrius Janušas

at Kaunas Univ of Technology

SPIE Involvement:

Conference Program Committee | Author

Publications (23)

Proceedings Article | 9 June 2023 Presentation + Paper

Mechanochromic luminescent derivatives based on xanthenone and thioxanthenone for the fabrication of OLED devices as emitter layer

Sohrab Nasiri, Giedrius Janusas

Proceedings Volume 12584, 1258402 (2023) https://doi.org/10.1117/12.2668347

KEYWORDS: Organic light emitting diodes, Fluorescence, Crystals, X-ray diffraction, Molecules, Fabrication, External quantum efficiency, Quantum efficiency, Fluorescence intensity, Solids

Read Abstract +

Proceedings Article | 2 March 2020 Paper

Aluminum oxide membrane as a functional element for filtering bioparticles in micro hydraulic devices

Yatinkumar Patel, Arvydas Palevičius, Vytenis Naginevičius, Judita Liaudanskaite, Giedrius Janušas

Proceedings Volume 11270, 1127004 (2020) https://doi.org/10.1117/12.2541640

KEYWORDS: Particles, Aluminum, Holography, Microfluidics, Nanolithography, Actuators

Read Abstract +

Proceedings Article | 19 February 2018 Paper

Q-factor control of multilayer micromembrane using PZT composite material

Elingas Čekas, Giedrius Janušas, Arvydas Palevicius, Tomas Janušas, Justas Ciganas

Proceedings Volume 10491, 104910S (2018) https://doi.org/10.1117/12.2286618

KEYWORDS: Microelectromechanical systems, Polymethylmethacrylate, Aluminum, Multilayers, Nanocomposites, Coating, Composites

Read Abstract +

Proceedings Article | 22 August 2017 Paper

Image encryption scheme based on computer generated holography and time-averaged moiré

Paulius Palevicius, Minvydas Ragulskis, Giedrius Janusas, Arvydas Palevicius

Proceedings Volume 10453, 104531H (2017) https://doi.org/10.1117/12.2272126

KEYWORDS: Computer generated holography, 3D microstructuring, Cryptography, Image encryption, Electron beam lithography, Optics manufacturing, Manufacturing, Stochastic processes

Read Abstract +

Proceedings Article | 14 June 2017 Paper

Influence of binding material of PZT coating on microresonator's electrical and mechanical properties

Giedrius Janusas, Asta Guobiene, Arvydas Palevicius, Alfredas Brunius, Elingas Cekas, Valentinas Baltrusaitis, Rokas Sakalys

Proceedings Volume 10246, 102461E (2017) https://doi.org/10.1117/12.2265978

KEYWORDS: Coating, Microresonators, Electronic components, Control systems, Ferroelectric materials, Composites, Polymethylmethacrylate, Sensors, Particles, Multilayers, Microelectromechanical systems

Read Abstract +

Proceedings Article | 29 April 2016 Paper

Development and investigation of MOEMS type displacement-pressure sensor for biological information monitoring

Vytautas Ostasevicius, Karolis Malinauskas, Giedrius Janusas, Arvydas Palevicius, Elingas Cekas

Proceedings Volume 9899, 98992Q (2016) https://doi.org/10.1117/12.2228792

KEYWORDS: Microopto electromechanical systems, Arteries, Diagnostics, Diffractive optical elements, Interferometry, Numerical analysis, Blood pressure, Blood, Protactinium, Manufacturing, Diffraction, Silicon, Shape analysis

Read Abstract +

Proceedings Article | 27 April 2016 Paper

Development and analysis of new type microresonator with electro-optic feedback

Giedrius Janusas, Arvydas Palevicius, Elingas Cekas, Alfredas Brunius, Jokubas Bauce

Proceedings Volume 9889, 98891N (2016) https://doi.org/10.1117/12.2228789

KEYWORDS: Biological research, Electro optics, Optical components, Sensors, Microelectromechanical systems, Electro optical sensors, Microelectromechanical systems, Pollution detection, Mathematical modeling, Biological research, Electro optics, Aluminum, Copper, Chemical elements

Read Abstract +

Proceedings Article | 16 April 2016 Paper

Development of complex 3D microstructures based on computer generated holography and their usage for biomedical applications

Arvydas Palevicius, Viktoras Grigaliunas, Giedrius Janusas, Paulius Palevicius, Rokas Sakalys

Proceedings Volume 9802, 98021O (2016) https://doi.org/10.1117/12.2218848

KEYWORDS: 3D microstructuring, Computer generated holography, Electron beam lithography, Biomedical optics, Sensors, Biosensing, Information technology, Medical research, Analytical research, Computer simulations, Polymethylmethacrylate, Polymers, Holograms, Optical design, Diffraction

Read Abstract +

Proceedings Article | 21 May 2015 Paper

Microstructures replication using high frequency excitation

Arvydas Palevicius, Giedrius Janusas, Elingas Cekas, Rokas Sakalys, Ieva Paleviciute, Evaldas Ramoska

Proceedings Volume 9517, 951722 (2015) https://doi.org/10.1117/12.2182563

KEYWORDS: Diffraction, Polymers, Prisms, Mechanical efficiency, Diffraction gratings, Photodiodes, Holograms, Aluminum, Mechanical engineering, Laser spectroscopy

Read Abstract +

Proceedings Article | 2 April 2015 Paper

Novel composite piezoelectric material for energy harvesting applications

Giedrius Janusas, Asta Guobiene, Arvydas Palevicius, Igoris Prosycevas, Sigita Ponelyte, Valentinas Baltrusaitis, Rokas Sakalys

Proceedings Volume 9430, 943030 (2015) https://doi.org/10.1117/12.2176628

KEYWORDS: Ferroelectric materials, Composites, Energy harvesting, Electronics, Sensors, Prisms, Electromagnetism, Copper, Oscilloscopes, Microsystems

Read Abstract +

Proceedings Article | 22 August 2014 Paper

A technique for the reconstruction of a map of continuous curves from interference fringes

Paulius Palevicius, Minvydas Ragulskis, Giedrius Janušas, Arvydas Palevicius

Proceedings Volume 9286, 92861G (2014) https://doi.org/10.1117/12.2060743

KEYWORDS: Holography, Fringe analysis, Digital holography, 3D image processing, Binary data, Phase shifts, 3D metrology, Image quality, Optical testing, Phase shifting

Read Abstract +

Proceedings Article | 7 February 2012 Paper

Numerical simulation of hot imprint process of periodical lamellar microstructure into polycarbonate

Rimvydas Gaidys, Birutė Narijauskaitė, Arvydas Palevičius, Giedrius Janušas

Proceedings Volume 8248, 82480I (2012) https://doi.org/10.1117/12.915107

KEYWORDS: Polymers, Numerical simulations, Finite element methods, Mathematical modeling, Glasses, Chemical elements, Thermal modeling, Computer simulations, Nickel, Laser optics

Read Abstract +

Proceedings Article | 2 April 2010 Paper

Investigation of periodical microstructures using coherent radiation

Giedrius Janusas, Arvydas Palevicius, Regita Bendikiene, Paulius Palevicius

Proceedings Volume 7638, 76383Q (2010) https://doi.org/10.1117/12.855943

KEYWORDS: Diffraction, Mirrors, Geometrical optics, Polymers, Silicon, Process control, Error analysis, Diffraction gratings, Helium cadmium lasers, Optical testing

Read Abstract +

Proceedings Article | 19 April 2008 Paper

Analysis dynamics of piezoelectric optical scanner with periodical microstructure

Arvydas Palevicius, Giedrius Janusas, Vytautas Ostasevicius, Ramutis Bansevicius, Alfredas Busilas, Dalius Rubliauskas

Proceedings Volume 6928, 69282H (2008) https://doi.org/10.1117/12.776762

KEYWORDS: Optical scanning, Scanners, Diffraction, Optics manufacturing, Optical components, Diffraction gratings, Holography, Solar concentrators, Nickel, Chemical elements

Read Abstract +

Proceedings Article | 5 April 2007 Paper

Optical characterization of microstructures of high aspect ratio

T. Tamulevicius, S. Tamulevicius, M. Andrulevicius, G. Janusas, V. Ostasevicius, A. Palevicius

Proceedings Volume 6518, 65183Q (2007) https://doi.org/10.1117/12.714245

KEYWORDS: Diffraction, Diffraction gratings, Scanning electron microscopy, Silicon, Reactive ion etching, Computer simulations, Geometrical optics, Microfluidics, Chemical elements, Chemical analysis

Read Abstract +

Proceedings Article | 21 June 2006 Paper

Generalised Abel transform for the analysis of fluid vibrations

M. Ragulskis, A. Palevicius, L. Ragulskis, A. Bubulis, G. Janusas

Proceedings Volume 6345, 634514 (2006) https://doi.org/10.1117/12.693158

KEYWORDS: Digital holography, Holography, Holograms, Digital imaging, Motion models, Digital image correlation, Mirrors, Systems modeling, Beam splitters, Finite element methods

Read Abstract +

Development of hybrid numerical-experimental techniques is an important method of analysis used for interpretation and validation of experimental results. Laser holography is a powerful experimental technique for analysis of high frequency vibrations of the fluid, especially when the amplitudes of those vibrations are relatively small. It is assumed that the angular frequency of excitation coincides with the eigenfrequency of the appropriate eigenmode and thus the eigenproblem is solved. The problem of fluid eigen-vibrations in axi-symmetric geometry according to the first harmonic in the circumferential direction is analyzed. This problem has a practical application in the analysis of transverse vibrations of the fluid in an axi-symmetric pipe. The numerical model is developed on the basis of the finite element model of the fluid and the method of analysis of the problems with axi-symmetric geometry. The irrotational motions of the ideal compressible fluid are analyzed. The numerical model of the system is based on the approximation of nodal displacements via the shape functions. Thus the field of the amplitudes of the circumferential variation of the volumetric strain is calculated using the procedure of conjugate approximation. By using the procedure of conjugate approximation the amplitudes of circumferential variation of nodal volumetric strains for the eigenmodes are determined. The obtained field of volumetric strain is used in the numerical procedure for the construction of the digital holographic image. Thus the calculation of the amplitudes of circumferential variation of nodal volumetric strains consists of two stages: 1) calculations using the displacement formulation for the first harmonic in the circumferential direction by the method of finite elements; 2) determination of the field of the amplitudes of the circumferential variation of the volumetric strain by using the procedure of conjugate approximation. The obtained nodal values of the amplitudes of the circumferential variation of the volumetric strain are used in the construction of the digital holographic images. For this purpose the Abel transform which is usually used in axi-symmetric problems is generalized for the problems with axi-symmetric geometry with the variation of displacements according to the first harmonic in the circumferential direction. On the basis of the generalized Abel transform the digital holographic images are constructed. The obtained digital holographic images are used in the hybrid experimental-numerical procedure for the determination of the correlation with the experimental holographic images.

Proceedings Article | 21 June 2006 Paper

Hybrid numerical-experimental moiré technique for analysis of microstructures

L. Saunoriene, M. Ragulskis, A. Palevicius, V. Ostasevicius, G. Janusas

Proceedings Volume 6345, 634511 (2006) https://doi.org/10.1117/12.693150

KEYWORDS: Finite element methods, Moire patterns, Reflection, Photography, Vibrometry, Mirrors, Microelectromechanical systems, Mathematical modeling, Image processing, Digital image processing

Read Abstract +

Proceedings Article | 24 March 2006 Paper

Thermal stress kinetics in the microresist–silicon system

S. Tamulevicius, V. Grigaliunas, D. Jucius, V. Ostasevicius, A. Palevicius, G. Janusas

Proceedings Volume 6151, 61512I (2006) https://doi.org/10.1117/12.659952

KEYWORDS: Polymers, Silicon, Nanoimprint lithography, Crystals, Interferometers, Semiconductor lasers, Electronics, Temperature metrology, Polymethylmethacrylate, Photoresist processing

Read Abstract +

SPIE Journal Paper | 1 January 2006

Optical characterization of diffractive optical elements replicated in polymers

Sigitas Tamulevicius, Asta Guobiene, Giedrius Janusas, Arvydas Palevicius, Vytautas Ostasevicius, Mindaugas Andrulevicius

JM3, Vol. 5, Issue 01, 013004, (January 2006) https://doi.org/10.1117/12.10.1117/1.2170098

KEYWORDS: Diffraction gratings, Diffraction, Polymers, Silicon, Ultraviolet radiation, Nickel, Atomic force microscopy, Diffractive optical elements, Polymethylmethacrylate, Modulation

Read Abstract +

Proceedings Article | 12 October 2005 Paper

Hybrid numerical-experimental optical investigation of the contact zone of ultrasonic motors

Vytautas Ostasevicius, Arvydas Palevicius, Minvydas Ragulskis, Giedrius Janusas, Kestutis Pilkauskas

Proceedings Volume 5958, 59582R (2005) https://doi.org/10.1117/12.623146

KEYWORDS: Ultrasonics, Actuators, Atomic force microscopy, Electrodes, Surgery, Hybrid optics, Electromagnetism, Holography, Atomic force microscope, Dielectrics

Read Abstract +

Proceedings Article | 16 May 2005 Paper

Applicability of holographic technique for analysis of nonlinear dynamics of MEMS switch

Vytautas Ostasevicius, Minvydas Ragulskis, Arvydas Palevicius, V. Kravcenkiene, Giedrius Janusas

Proceedings Volume 5763, (2005) https://doi.org/10.1117/12.599027

KEYWORDS: Microelectromechanical systems, Holography, Holograms, Switches, Copper, Electrodes, Systems modeling, Inverse optics, Inverse problems, Electron beam lithography

Read Abstract +

Proceedings Article | 10 May 2005 Paper

Optical characterization of diffractive optical elements replicated in polymers

Sigitas Tamulevicius, Giedrius Janusas, Asta Guobiene, Arvydas Palevicius, Vytautas Ostasevicius, Mindaugas Andrulevicius

Proceedings Volume 5752, (2005) https://doi.org/10.1117/12.597628

KEYWORDS: Diffraction gratings, Diffraction, Polymers, Silicon, Atomic force microscopy, Ultraviolet radiation, Nickel, Diffractive optical elements, Computer simulations, Modulation

Read Abstract +

Proceedings Article | 22 June 2004 Paper

Adaptive structural vibration control of acoustic deflector

Vytautas Ostasevicius, Arvydas Palevicius, Minvydas Ragulskis, Donatas Dagys, Giedrius Janusas

Proceedings Volume 5503, (2004) https://doi.org/10.1117/12.579545

KEYWORDS: Chemical elements, Actuators, Finite element methods, Acoustics, 3D modeling, Vibration control, Computer simulations, Manufacturing, Mathematical modeling, Legal

Read Abstract +