Evaldas Stankevicius

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Laser beam shaping and homogenization techniques are substantial to optimize a large number of laser-material processing applications and laser-material interaction studies. Diffractive optical elements (DOE) play important role in provision of the process-adapted laser beam shaping. In this paper, we present an approach for laser beam shaping by using(More)
This paper proposes method for evaluating interference from LTE User Equipment (UE) operating in the frequency band 792-862 MHz to Short Range Devices in the band 863-870 MHz. The primary analysis objective is to investigate the efficacy of LTE UE emission mask as defined in current standards. The study was carried out in two phases: first applying(More)
Formation of polymeric pillars by using laser interference lithography is compared for nanosecond and picosecond laser pulses. The experimental results are explained by dynamics of laser-excited radicals. The shape of fabricated structures demonstrates that thermal accumulation and oxygen diffusion from the surrounding air make an influence on(More)
Here, we report the formation of Bessel-like beam array from periodic patterns fabricated by the four-beam interference lithography. Characteristics of the generated Bessel-like beams depend on geometrical parameters of the fabricated microaxicon-like structures, which can be easily controlled via the laser processing parameters. The output beam(More)
A novel fluoroaryl azide with an alkyne tail was synthesized and precisely immobilized within a PEG-based matrix via two-photon induced decomposition and nitrene insertion. Well defined 3D positioning of the terminal alkyne allows site-specific micropatterning. The subsequent 3D alkyne-azide cycloaddition was realized using dye-functionalized molecules(More)
Generation of Bessel-like beam array from polymeric microstructures, which were created using four-beam interference lithography is demonstrated. Quality of the produced Bessel-like beams depends on the geometrical parameters of the manufactured axicon-like structures, and their shape can be efficiently controlled through the laser treatment parameters. The(More)
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