Orestas Ulčinas

TL;DR: In this paper, high-order vector Bessel-Gauss beams from a theoretical perspective were applied to transparent-material laser micromachining, and two geometric-phase-based optical elements, a highorder $S$-wave plate and an axicon in combination with simple optical elements such as lenses, wave plates, and polarizers, were demonstrated.

TL;DR: In this paper, a high-quality vector Bessel beam was generated using an S-wave plate (radial/azimuth polarization converter) together with an ordinary glass axicon.

TL;DR: It is demonstrated that virgin PI films provide a suitable environment for the mobility, proliferation and intercellular communication of human bone marrow mesenchymal stem cells, and how cell behaviour varies on the micro‐machined PI films with holes of different diameters is discussed.

TL;DR: In this article, a transient absorption spectroscopy focusing on localized surface plasmon resonance (LSPR) of photoexcited Cu nanoparticles was used to study ultrafast relaxation processes in diamond-like carbon (DLC) thin films with embedded CU nanoparticles, and the relaxation time was found to be independent of the excitation intensity up to tens of microjoule per square centimeter per pulse and to increase at higher intensities.