A. Pandey, and N. Litchinitser
The State University of New York at Buffalo
Transition metamaterials constitute a new class of engineered materials which have material properties tailored in such a manner that the refractive index gradually changes from positive to negative. An important question is what happens at the interface of a positive and negative index material. In this work, we design anisotropic transition materials using metal-dielectric layers and study ...
Numerical simulations of heat effects compared to measurements in III-V semiconductor saturable absorbers.
LePaul, S., Yang, N., Aniel, F.
Institut d’Electronique Fondamentale, Université Paris XI – CNRS UMR 8622, Orsay
The major purpose of this communication is to share our experiences on the numerical difficulties we ended up in simulating heating effects of saturable absorbers based on III-V semiconductors with the commercial finite element software FEMLAB 3.1. Saturable absorbers are devices devoted to full optical signal regeneration in optical telecom systems. The self heating effects in the structures ...
Light Scattering Simulation of Nano-objects on the Surface of Silicon Wafers by 3D Finite Element Method
Y. Oshikane, T. Higashi, N. Taniguchi, M. Nakano, and H. Inoue
Dept. of Prec. Sci. and Technology
Grad. School of Eng.
Nanotechnology is rated as a key technology of the 21st century. In the field of nano-optics already at present, state-of-the-art scientific experiments and industrial applications exhibit nanometer to sub-nanometer design tolerances. This motivates the development and application of fast and accurate simulation tools for these fields or electromagnetic (EM) field.
A. Pors, O. Albrektsen, S.I. Bozhevolnyi, and M. Willatzen
Mads Clausen Institute, University of Southern Denmark, Sønderborg, Denmark
Institute of Sensors, Signals and Electrotechnics, University of Southern Denmark, Odense, Denmark
The use of plasmonic effects to dramatically enhance the electromagnetic field near the surface of a metallic nanostructured surface has grown into a large research area in the effort to take advantage of the surface enhanced field. In this paper the electromagnetic field near a nano-sized truncated spherical cavity embedded in a gold substrate is investigated and modeled in 3D with COMSOL ...
N. Katte, J. Haus, J.B. Serushema, and M. Scalora
University of Dayton, Dayton, OH, USA
Charles M. Bowden Research Center, Redstone Arsenal, AL, USA
We show that diffraction can be suppressed in a one-dimensional metallodielectric stack (MDS) at visible wavelengths to achieve super-resolution imaging. In our calculations we use two popular techniques, which can be adapted to investigate the imaging properties of MDSs. The two methods are the transfer matrix method (TMM) and the Finite element method based software, COMSOL Multiphysics. The ...
Toyama Prefectural University
In order to design invisibility cloak, we use two different type of spaces: Physical space and Mathematical space. This paper is in Japanese.
B. Kreisler, G. Anton, J. Durst, and T. Michel
Physikalisches Institut Abt. IV, Erlangen
The motion of free charge carriers in semiconductors was simulated using the convection and diffusion module in COMSOL. The focus of this work is the sensor layer of the Medipix2 x-ray detector, in our case made of silicon. The charge cloud generated by photon interactions within the sensor material moves through the material due to an applied electric field. The charges are collected by the ...
Complex K-Bands Calculation for Plasmonic Crystal Slabs by Means of Weak Formulation of Helmholtz's Eigenvalue Equation
G. Parisi, P. Zilio, F. Romanato
University of Padova, Padova, Italy
We present a Finite Element Method (FEM) to calculate the complex valued k(?) dispersion curves of a photonic crystal slab in presence of both dispersive and lossy materials. In particular the method can be exploited to study plasmonic crystal slabs. We adopt Perfectly Matched Layers (PMLs) in order to truncate the open boundaries of the model, including their related anisotropic permittivity and ...
In this presentation we outline our recent work on Magnetic Liquids, and the great number of application areas these are used. Ferrofluids are nanometer sized magnetic particles, covered by a surfactant, suspended in a carrier medium compatible with the surfactant material. Ferrofluids are applicable to a great and ever increasing number of application areas, such as: • Liquid Seals and ...
C. Del Vecchio, G. Agapito, G. Tomassi, and E. De Santis
National Institute for Astrophysics, Arcetri Astrophysical Observatory, Firenze, Italy
University of Cassino, Cassino, Italy
The next-generation of Extremely Large Telescopes adaptive optics systems require high-order, long-stroke, quite large deformable mirrors. Higher forces and greater actuator densities than the ones provided by the current technology are needed, still maintaining the severe accuracy and bandwidth requests. Based on a very simple magnetic circuit, providing a compact device, the VRALA actuator ...