Browsing by Author "PEROVA, TANIA"
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Alignment of liquid crystal E7 in composite photonic crystals based on single crystal silicon
PEROVA, TANIA (SPIE, 2005)The orientation of nematic liquid crystal (LC) E7 on the surface of (111) silicon wafers and in the channels of grooved silicon structure has been investigated. Grooved Si is a periodical structure obtained by wet anisotropic ... -
Amplified spontaneous emission from a microtube cavity with whispering gallery modes
DONEGAN, JOHN; PEROVA, TANIA; RAKOVICH, YURY; GOUNKO, IOURI (2007)We present a detailed study of the photonic modes in microtube cavity of ~ 7-8 ?m outer diameter that can act as micron-scale optical cylindrical resonator. We demonstrate a new route to the fabrication of individual ... -
Analysis of Strain and Intermixing in a Single Layer Ge/Si dots using polarized Raman Spectroscopy
PEROVA, TANIA; MOORE, ROBERT (2006)The built-in strain and composition of as-grown and Si-capped single layers of Ge?Si dots grown at various temperatures (460?800 ?C) are studied by a comparative analysis of the Ge-Ge and Si-Ge modes in the polarized Raman ... -
Broad band infrared spectroscopy of grooved silicon
PEROVA, TANIA (SPIE, 2005)Grooved silicon (gr-Si) structures with a period of few micrometers, which were formed by anisotropic etching of (110) Si wafers, have been investigated by means of broad band infrared (IR) and submillimeter transmission ... -
Characterisation of Macro-porous Silicon for Electronic Applications
PEROVA, TANIA; MOORE, ALAN (SPIE, 2003)Micro-Raman spectroscopy was used in this study for the analysis of the influence of process conditions on the strain and stress in macro-porous layers. As expected, it was found that oxidation results in significant wafer ... -
Characterisation of thin film silicon films deposited by plasma enhanced chemical vapour deposition at 162MHz, using a large area, scalable, multi-tile-electrode plasma source
PEROVA, TANIA; ADLEY, DAVID (2011)Large area (600 ? 720 mm) depositions of hydrogenated microcrystalline silicon (?c-Si:H) have been achieved at high deposition rates using a scalable, multi-tile electrode topology. Depositions have shown local results of ... -
Characterization of Rapid Melt Growth (RMG) Process for High Quality Thin Film Germanium on Insulator
PEROVA, TANIA (2012)Germanium is one of the most promising materials for high performance infra-red photovoltaic devices. High quality singlecrystal germanium on insulator structures can be produced by a Rapid Melt Growth process. Experiments ... -
Composition and strain in thin Si1-xGex virtual substrates measured by micro-Raman spectroscopy and X-ray diffraction
RODE, KARSTEN; WASYLUK, JOANNA; PEROVA, TANIA (2011)Micro-Raman spectroscopy was employed for the determination of the germanium content, x and strain, , in ultrathin SiGe virtual substrates grown directly on Si by molecular beam epitaxy. The growth of highly relaxed ... -
Composition and Stress Analysis in Si/SiGe Structures
MOORE, ROBERT; PEROVA, TANIA (IEEE, 2004)Strained Si tecbnology enables improvements in CMOS performance and functionality via replacement of the bulk, cubic-crystal Si substrate witb a Si substrate that contains a tetragonally distorted, biaxially strained ... -
Confined modes in photonic microtube structures.
RAKOVICH, YURY; PEROVA, TANIA; DONEGAN, JOHN; MOORE, ROBERT (SPIE, 2007)We present the results of studies on small photonic microtube structures of less than 10 microns diameter. A new technique based on vacuum assisted filtration is used to produce the microtube resonantors. Whispering gallery ... -
Confined optical modes and amplified spontaneous emission from a microtube cavity formed by vacumm assisted filtration
GOUNKO, IOURI; DONEGAN, JOHN FRANCIS; PEROVA, TANIA; RAKOVICH, YURY (American Physical Society, 2006)The authors demonstrate a new route to the fabrication of individual aluminosilicate microtubes that can act as micron-scale optical cylindrical resonators. The microtubes were prepared using a simple vacuum assisted wetting ... -
COUPLED SILICON-AIR FABRY-PEROT RESONATORS WITH TUNABLE TRIPLET MODES
PEROVA, TANIA (2014) -
Design of 1D composite photonic crystals with an extended photonic band gap
PEROVA, TANIA (2006)A technique for photonic band gap PBG extension based on mixing photonic crystals with different lattice constants or filling factors is suggested. For the design of photonic crystals with maximal PBG extension the gap ... -
Design of One-dimensional Photonic Crystals Using Combination of Band Diagram and Photonic Gap Map Approaches
PEROVA, TANIA (American Institute of Physics, 2008)The design of one-dimensional photonic crystals and the analysis of their optical properties have been performed using band diagram and forbidden gap map methods. It has been shown that the latter method is more useful for ... -
Design of three-component one-dimensional photonic crystals for alteration of optical contrast and omni-directional reflection
PEROVA, TANIA (2010)In this study, three-component One-Dimensional (1D) Photonic Crystal (PC) structures were investigated by modeling them as two-component PCs with an additional regular layer. The Gap Map approach and the Transfer Matrix ... -
Design, fabrication and optical characterization of Fabry-Pérot tunable resonator based on microstructured Si and liquid crystal
PEROVA, TANIA (2010)The results of a simulation of the optical properties of a silicon Fabry-Perot resonator (with liquid crystal filler in the cavity), operated on the shift of the interference bands in the infrared range are presented. The ... -
Design, fabrication and Optical Characterization of Multi-Component Photonic Crystals for Integrated Si Microphotonics
PEROVA, TANIA (2011)This paper reports on investigation and possible applications of the optical elements based on one-dimensional (1D) multi-component photonic crystal (PCs). The gap map approach and the transfer matrix method were used in ... -
Determination of substitutional carbon content in rapid thermal chemical vapour deposited Si1-x-yGexCy on Si (1 0 0) using Raman spectroscopy
PEROVA, TANIA (Elsevier, 2009)The effect of carbon content on strain compensation in rapid thermal chemical vapour deposited Si1-x-yGexCy films was investigated using Raman spectroscopy as x varies from 10% to 16% and y varies from 0% to 1.8%. The ... -
Doped quantum dots for photovoltaics
PEROVA, TANIA (OSA, 2014) -
Dynamic in-situ sensing of fluid-dispersed 2D materials integrated on microfluidic Si chip
PEROVA, TANIA; GOUNKO, IOURI (2017)In this work, we propose a novel approach for wafer-scale integration of 2D materials on CMOS photonic chip utilising methods of synthetic chemistry and microfluidics technology. We have successfully demonstrated that this ...