Lina Grinevičiūtė

Lina Grinevičiūtė
Center for Physical Sciences and Technology | CPST

PhD

About

48
Publications
4,937
Reads
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180
Citations
Education
October 2016 - September 2020
Center for Physical Sciences and Technology
Field of study
September 2014 - September 2016
Kaunas University of Technology
Field of study
  • Physics

Publications

Publications (48)
Article
Polarisation analysis of thin (∼1μm) SiO2 films deposited via evaporation at a glancing angle of 70°to the normal on resist pillar arrays was carried out using synchrotron-based Fourier transform infrared (s-FTIR) microspectroscopy in reflection mode. Changes in intensity of absorption bands were observed to follow the angular dependence of ∼cos2θ,...
Article
This study has demonstrated that 3D columnar micro-films/coatings can be deposited over pre-patterned surfaces with sub-micrometer periodic patterns. Four-angle polarisation analysis of thin (0.4 − 1~ μ m) Si and SiO 2 films, evaporated via glancing angle deposition (GLAD) at 70° to the normal, was carried out in reflection mode using synchrotron i...
Conference Paper
The conformal deposition of high refractive index films on the modulated surface was investigated. Fabricated single-layer photonic structures show sharp angle-wavelength sensitivity of transmission and imply spatial and spectral filtering abilities.
Conference Paper
In this study two topics are presented: i) anisotropic coatings for phase and polarization control and ii) dielectric structures with periodic modulation of optical constants together with the application of angular filtering of light.
Conference Paper
Zero angle polarizers and achromatic waveplates were coated using anisotropic thin films. Multilayer approach with different orientations of optical axes for individual layers allowed for independent control of perpendicular polarization intensity and phase retardance properties.
Article
Full-text available
Polarisation analysis in the mid-infrared fingerprint region was carried out on thin (∼1 μm) Si and SiO2 films evaporated via glancing angle deposition (GLAD) method at 70∘ to the normal. Synchrotron-based infrared microspectroscopic measurements were carried out on the Infrared Microspectroscopy (IRM) beamline at Australian Synchrotron. Specific a...
Preprint
Full-text available
Polarisation analysis in the mid-infrared fingerprint region was carried out on thin (∼1μm) Si and SiO2 films evaporated via glancing angle deposition (GLAD) method at 70∘ to the normal. Synchrotron-based infrared microspectroscopic measurements were carried out on the Infrared Microspectroscopy (IRM) beamline at Australian Synchrotron. Specific ab...
Article
We propose and demonstrate experimentally super-collimation of light beams by an axisymmetric diffractive metamirror-an axisymmetric concentric dielectric ring structure positioned in front of a mirror at a distance of several micrometers. By super-collimation, we mean the formation of a well-collimated beam characterized by a substantial enhanceme...
Article
A conceptually novel mechanism of spatial filtering of laser light in the near‐field domain is proposed, in contrast to conventional filtering in the far‐field. Filtering occurs in transmission through a thin multilayer coating, built by physical vapor deposition on a nano‐modulated substrate. Such a 5 µm thick structure is experimentally shown to...
Article
Recent developments of nanostructured coatings have reached a point where extensive investigations within multi-layer systems are necessary for further implementation in novel photonic systems. Although sculptured thin films are explored for decades, no optical and structural measurements have been performed for anisotropic nanostructured multi-lay...
Article
Full-text available
Fano-like resonant coupling of electromagnetic radiation with planar waveguiding modes of nanostructured thin films is proposed and realized experimentally. Different from conventional Fano coupling to compact resonators with the discrete spectrum, we report Fano-like coupling to infinitely extended planar waveguiding modes of the spatially unbound...
Article
Full-text available
Spatial filtering is an important mechanism to improve the spatial quality of laser beams. Typically, a confocal arrangement of lenses with a diaphragm in the focal plane is used for intracavity spatial filtering. Such conventional filtering requires access to the far‐field domain. In microlasers, however, conventional filtering is impossible due t...
Article
Full-text available
Several fundamental restrictions limit the implementation of microlasers in high power systems, low resistivity of coatings and compactness of elements, especially if control of polarization is necessary. Thin-film-based coatings with extremely high optical resistivity and polarizing properties for normal incidence could become a preferable solutio...
Preprint
Full-text available
Spatial filtering is an important mechanism to improve the spatial quality of laser beams. Typically, a confocal arrangement of lenses with a diaphragm in the focal plane is used for intracavity spatial filtering. Such conventional filtering requires access to the far-field domain. In microlasers, however, conventional filtering is impossible due t...
Article
The total generated output power in high-power laser systems is mainly limited by the laser-induced damage phenomena in coated optics. A significant part of optics include high reflectivity coatings. A research was conducted for the development of advanced high reflectivity mirrors, capable to withstand extreme laser fluence and featuring spectral...
Article
Full-text available
The total internal refection ellipsometry (TIRE) method was used for the generation and study of the hybrid TPP-SPP mode on a photonic crystal structure with a thin layer of silver and graphene/PMMA. Raman spectroscopy showed a consistent monolayer graphene present on the Ag layer. Recent studies have also shown that TPP and SPP components in the h...
Conference Paper
In this study, we propose and experimentally demonstrate spatial filtering of light by the photonic wavy structures designed to be operated in a Bragg regime. The proposed configuration is designed, optimized and analyzed by 3D finite-difference time-domain (FDTD) method. Both incidence angle variation and wavelength dependency are examined in deta...
Article
Full-text available
Thin film growth of ${\textrm{TiO}}_2$TiO2 by physical vapor deposition processes is simulated in the Virtual Coater framework resulting in virtual thin films. The simulations are carried out for artificial, simplified deposition conditions as well as for conditions representing a real coating process. The study focuses on porous films which exhibi...
Preprint
Full-text available
A simple procedure is demonstrated for fabrication of waveplates which can be released from substrate by laser cutting. Oblique angle deposition, chemical etching and laser inscription steps were used for the final lift-off and release of micro-waveplates in HCl solution.
Article
We propose and experimentally demonstrate spatial filtering by photonic crystals in a Bragg configuration. Compared to the Laue configuration, where spatial filtering was already demonstrated before, the Bragg configuration is more technologically challenging, as the longitudinal periods of such structures must be shorter than the operational wavel...
Conference Paper
Novel route is presented to manufacture high reflection coatings using only SiO2 material and GLAD method. A numerous analyses indicate the superior properties of all-silica coatings when compared with standard methods for Bragg mirrors production.
Conference Paper
The novel approach of high band-gap birefringent coatings was proposed and investigated. Zero-order retarders with low optical losses and the potential to withstand high laser fluences at 355 and 266 nm wavelengths were produced.
Article
Recently, oblique angle deposition has been extensively used to form advanced optical coatings for high power lasers. In present work (article No. 201700764), a novel approach to form multilayer zero-order all-silica based waveplates is demonstrated. Study shows the superior optical performance of tested sample and capabilities to withstand high la...
Article
Full-text available
Waveplates, used to modify polarization state of light, are integral part of high-power lasers. Classical approach to waveplate manufacturing is based on combination of birefringent crystalline materials and deposition of nonpolarizing antireflection (AR) coatings. Their limitation to withstand maximal peak power is determined by laser-induced dama...
Article
Full-text available
A principal possibility to overcome fundamental (intrinsic) limit of pure optical materials laser light resistance is investigated by designing artificial materials with desired optical properties. We explore the suitability of high band-gap ultra-low refractive index material (n less than 1.38 at 550 nm) in the context of highly reflective coating...
Article
Achieving higher optical power in UV laser systems is a challenging task due to the limited performance of their built-in optical elements. As a rule of thumb, interference coatings of such elements are found to be the weakest links by the means of laser-induced damage threshold (LIDT). The optical resistance is directly attributed to the fundament...
Article
The stresses in thin films are one of the main problems in the development of small dimensions or thin optical components. In order to produce low-tension anisotropic coatings, the characterization of serial bideposition is essential. Structural and optical performance have been tested for anisotropic TiO2 thin films deposited by serial bidepositio...
Conference Paper
br /> Characterisation and investigation of serial bi-deposition method is presented for manufacture of Al2O3 sculptured thin films. By varying the parameters of method, spectral and structural performances were tested.

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Projects

Project (1)
Project
The main goal of the project is the development and research of prototype optical components with unique phase and polarization control properties for high-power lasers. Optical components will be developed using the technology of thin amorphous silica anisotropic layers formed by GLancing Angle Deposition (GLAD) method.