R. Singh, and I. Jose
BITS Pilani Goa Campus
Diffuse Optical Tomography (DOT) uses Near Infra-red (NIR) light to monitor physiological changes in internal organs. NIR light being less energetic in nature can be used for continuous monitoring of tumor infected biological tissue, neonatal brain and many such applications where high energy radiation can cause severe damage. The forward problem of DOT, which involves obtaining of the ...
Implementation of an 2D electro-thermal model for power semiconductor devices simulation: application on gallium nitride
Benbakhti, B., Rousseau, M., De Jeager, J.C.
Generally, the power dissipation in a semiconductor device generates self-heating effect. This effect is very significant in power applications using Gallium Nitride. Taking into account heating effects enables us to understand physical phenomena observed in experiments like the low saturation velocity. In this paper, numerical simulations were carried out to study the influence of thermal ...
Modeling of III-Nitride Quantum Wells with Arbitrary Crystallographic Orientation for Nitride-Based Photonics
M. Kisin, R. Brown, and H. El-Ghoroury
Ostendo Technologies, Inc., Carlsbad, CA, USA
A program for self-consistent modeling of electron-hole energy spectrum and space-charge distribution in III-nitride based quantum well (QW) structures has been developed. The model takes into consideration full 6-band description of the valence band states, nonparabolicity of the electron spectrum, quantum confinement of electrons and holes, strain induced modifications of the band structure, ...
Drift-Diffusion and Ballistic Transport Modeling in III-Nitride Multiple-QW Light Emitting Structures
M.V. Kisin, and H.S. El-Ghoroury
Ostendo Technologies Inc., Carlsbad, CA, USA
COMSOL-based modeling software developed at Ostendo Technologies allows detailed simulation of semiconductor lasers and light-emitting diodes. In this work, we study the inhomogeneity of the carrier injection into optically active quantum wells of polar and nonpolar III-nitride light emitters. Despite the absence of polarization-induced potential barriers, the nonpolar multiple-quantum well ...
J. Muñoz, G.J. Molina , M.M. Rojo
Dpto. Electromanetismo y Electrónica, Facultad de Química, Universidad de Murcia, Campus Espinardo, Murcia, Spain
Electromagnetic metamaterials present exotic and unusual properties hardly to be found in nature with many potential applications. They are usually built by distributing small resonant structures in periodical lattices. If the structure has chiral symmetry, the medium is called chiral metamaterial. Here the electrodynamics behavior of a chiral structure with a huge electromagnetic activity at ...
Thickness Designs for Micro-Thermoelectric Generators Using Three Dimensional PDE Coefficient-COMSOL Multiphysics 4.2a Analysis
S. Seif, K. Cadien
Department of Chemical & Materials Engineering, University of Alberta, Edmonton, AB, Canada
Predicting the optimum thickness and gap size between n-type and p-type legs of micro thermoelectric devices are the major challenges in designing micro thermo electric generators. We have reported the gap size and optimal thickness for optimal output power. We found that the gap size should be 0.1 microns; but, depending on fabrication capability, the gap size can be varied from 0.1 to 6 ...
G. Bachelier, I. Russier-Antoine, E. Benichou, C. Jonin, and P. F. Brevet
Laboratoire de Spectrométrie Ionique et Moléculaire, Université Claude Bernard Lyon1, Villeurbanne, France
In this presentation we present our results from modeling the second harmonic generation in noble metal nanoparticles. The model results are compared with experimnental results in order to validate the model.
Soochow University, Suzhou, China
In this section, we design an invisible cloak using the composite medium of silver nanowires with elliptical cross-sections embedded in a polymethyl methacrylate host. Under the guidance of an analytical effective medium approach, we use the parameter retrieval method to design a well-performed invisible cloak, based on an empirical revised version of the reduced cloak. The cloak is numerically ...
T. Hutter, N. Bamiedakis, and S. Elliott
Department of Chemistry, University of Cambridge, UK
Centre for Advanced Photonics and Electronics, Engineering Department, University of Cambridge, UK
The finite-element method (FEM) (COMSOL RF Module) has been employed for modal analyses of porous silicon (PSi) waveguides composed of a guiding layer of low porosity (high refractive index) on a cladding layer with higher porosity (lower refractive index). These can be made by switching the current density from a lower to a higher value during the electrochemical etching process. The ...
G. Louarn, S. Taleb, and S. Cuenot
Institut des Matériaux Jean Rouxel, Nantes
The knowledge of the light propagation through a nanometer-size aperture is crucial for Scanning Optical Near Field Microscopy (SNOM). In this work, we address a numerical study of the transmitted electric field through a SNOM probe. The influence of the wavelength is also studied. Our results show that the logarithmic power decreases linearly as a function of the aperture size, and the ...