Electronic & Electrical Eng: Recent submissions
Now showing items 381-400 of 750
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Electron-electron scattering in a double quantum dot: effective mass approach
(2010)We present a theoretical description of the first-order scattering of interacting electrons and holes in a double quantum dot. Assuming infinitely high walls, strong confinement, and a two-band approximation, we derive ... -
Multi-channel, Si-Liquid Crystal Filter, with Fine Tuning Capability of Individual Channels for Compensation of Fabrication Tolerances
(2012)In this study, a technique for the optimization of the optical characteristics of multi-channel filters after fabrication is proposed. The multi-channel filter under consideration is based on a Si photonic crystal (PhC), ... -
Surface states in optical spectra of two-dimensional photonic crystals with various surface terminations
(2012)Reflection and transmission spectra of two-dimensional photonic crystal slabs, fabricated by photoelectrochemical etching of deep macropores and trenches in Si, are investigated theoretically and experimentally. It is ... -
Characterization of Rapid Melt Growth (RMG) Process for High Quality Thin Film Germanium on Insulator
(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 ... -
The influence of light beam convergence on the stop-bands of a one-dimensional photonic crystal
(EMW Publishing, 2013-06-09)The infuence of beam convergence on the photonic band-gaps, or stop-bands (SBs), of one-dimensional photonic crystals (1D PCs) is investigated. The investigation is based on an analysis of the gap map obtained from re?ection ... -
Tunable microcavity based on macroporous silicon: feasibility of fabrication
(IEEE, 2013-08-16)Simultaneous electrochemical etching of deep pores and trenches in silicon was used to fabricate a two-dimensional, photonic crystal slab (PCS). The structure consists of five rows of macro-pores on both sides of a ... -
ViSQOL: The Virtual Speech Quality Objective Listener
(2012)A model of human speech quality perception has been developed to provide an objective measure for predicting subjective quality assessments. The Virtual Speech Quality Objective Listener (ViSQOL) model is a signal based ... -
Applications and Opportunities for Cognitive Radio and Networks
(IEEE, 2012-07)we present three aspects of cognitive radio and networks of importance to the research and commercial development community. We firstly outline key emerging application areas for CR/geo-location. Secondly, we look how the ... -
Short-range correlations seen in the nematic phase of bent-core liquid crystals by dielectric and electro-optic studies
(2011)Three bent-core nematic liquid crystals having the same core but with different terminal groups, short (C4) and long (C7,C9) tails, are investigated by dielectric and electro-optic contrast spectroscopic techniques. C4 ... -
An experimental study of the dynamic properties of nanoparticle colloids with identical magnetization but different particle size
(2012)Measurements of the frequency dependent complex magnetic susceptibility, ?(?)=??(?)?i??(?), have been used to determine the dynamic properties of three specially prepared 400 G (0.04 T) magnetic fluids. The samples, denoted ... -
Phase space master equations for quantum Brownian motion in a periodic potential: comparison of various kinetic models
(2011)The dynamics of quantum Brownian particles in a cosine periodic potential are studied using the phase space formalism associated with the Wigner representation of quantum mechanics. Various kinetic phase space master ... -
Microsecond linear optical response in the unusual nematic phase of achiral bimesogens
(2011)Some hydrocarbon linked mesogenic dimers are known to exhibit an additional nematic phase (N(x)) below a conventional uniaxial nematic (N(u)) phase. Although composed of non-chiral molecules, the N(x) phase is found to ... -
A wavelet-based Bayesian framework for 3D object segmentation in microscopy
(2012)In confocal microscopy, target objects are labeled with fluorescent markers in the living specimen, and usually appear with irregular brightness in the observed images. Also, due to the existence of out-of-focus objects ... -
The Effect of Local Field Dispersion on the Spectral Characteristics of Nanosized Particles and their Composites
(Intech, 2011)Infrared (IR) spectroscopy of micro- and nanosized particles and their composites is currently one of the most important enabling technologies in the development of micro- and nanostructures and their application to ... -
Electrically tunable Fabry-Pérot resonator based on microstrcutured Si containing liquid crystal
(2012)We have built Fabry-Perot resonators based on mi-crostructured silicon and a liquid crystal. The devices exhibit tuning of the resonance peaks over a wide range, with relative spectral shifts of up to ??/? = 10%. In order ... -
Investigation of germanium implanted with hydrogen for layer transfer applications
(2011)The technology for thin Ge layer transfer by hydrogen ion-cut process is characterised in this work. Experiments were carried out to determine suitable hydrogen ion implantation doses in germanium for the low temperature ... -
Fabrication Technology of Heterojunctions in the Lattice of a 2D Photonic Crystal Based on Macroporous Silicon
(2011)Design and fabrication technology of a microcavity structure based on a double heterojunction in macroporous silicon is suggested. The fabrication process of a strip of a 2D photonic crystal constituted by a finite number ... -
Design, fabrication and Optical Characterization of Multi-Component Photonic Crystals for Integrated Si Microphotonics
(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 ...
