M. Gonçalves, O. Marti
Ulm University - Inst. of Experimental Physics, Ulm, Germany
Plasmonic resonances arising in gold nanoparticles lead to strongly localized near-field enhancements. These enhancements generate strong field gradients that can be exploited in particle trapping. On the other hand plasmonic resonances lead to enhanced absorption and heat generation. Gold nanoparticles have been used to kill cancer cells based on plasmonic heating. We have investigated the ...
FE Modeling of Surfaces with Realistic 3D Roughness: Roughness Effects in Optics of Plasmonic Nanoantennas
J. Borneman, A. Kildishev, K. Chen, and V. Drachev
School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana, USA
COMSOL Multiphysics has been widely used to model the near and far-field electromagnetics (specifically, transmission and reflection spectra) of gold and silver nanoantenna arrays. We use a moving 3D mesh, thus preserving the DOF number and simply morphing the structure of the mesh to accommodate the moving boundary. The electromagnetics model consist of four multiphysics models, two ...
F. Dell’Olio, F. De Leonardis, and V.M.N. Passaro
Politecnico di Bari
One of the most important requirements of any integrated optical technology is the ability to perform optical modulation, which permits to encode a bit stream onto the optical carrier provided by the laser source. In this paper a multiphysics model for silicon modulators adopting a Metal Oxide Semiconductor (MOS) structure is presented.
Mathematics Department, University of California, Los Angeles, CA, USA
We present an optimization procedure to optimize the maximum coupling of free space optical wave to surface plasmon. Shape derivative from shape sensitivity analysis is calculated, and the corresponding partial derivatives of the objective functional with respect to finite number of design variables are derived. An optimal design of the gratings to couple maximum amount of free space photon into ...
Fibre-Optic Microsensor Based on Surface Plasmon Resonance in a Microfluidic Cell : An Experimental and Numerical Multiphysics Approach
G. Louarn, T. Makiabadi, V. Le Nader, and M. Kanso
Institut des Matériaux Jean-Rouxel (IMN), CNRS- Université de Nantes, France
In the last decade, the surface plasmon resonance (SPR) has become a very sensitive technique for real-time detection in many application areas. Considering the fiber optic concept and the important needs for analyzing biomolecular reactions through automated and miniaturized components, fiber optic sensors based on the SPR technique are becoming an important choice in the field of sensing. In ...
CEA Grenoble Leti
We use the MOS transistor model from COMSOL as a template to do our own model of double gate MOSFET. At the present time, it seems that double gate devices- going to non-planar transistor architectures- could be a solution for sub-32nm nodes. In addition, new design flexibility is allowed when gates are not interconnected. However, appropriate models must be developed. In our investigation, we ...
Northwestern University, Evanston, IL, USA
Dye sensitized solar cells (DSSCs) have received tremendous attention as alternative photon harvesting devices. While the sintered TiO2 nanoparticle network attached with dye molecules achieves efficient photon absorption, the electrons have to diffuse through the long TiO2 network to reach the contact, resulting in a high electron density and thus increased recombination. Extensive research ...
C. Gavrila and I. Lancranjan
Technical University of Civil Engineering Bucharest, Bucharest, Romania
Advanced Study Centre, National Institute for Aerospace Research “Elie Carafoli”, Bucharest, Romania
Fiber optic sensors can measure a large range of physical, chemical and environmental variables such as temperature, pressure, shape, position, chemical concentration, moisture, etc. Fiber optic sensors provide measurements in applications where the conventional electrical based sensors cannot be used, due to measurement requirements such as extreme temperature, small size, high sensor count, or ...
B. Sefa-Ntiri, and P.D. Prewett
University of Birmingham
Simulations of evanescent near field optical lithography (ENFOL) using an embedded metal mask (EMM) show that the resolution and throughput are significantly enhanced over conventional ENFOL, due to the coupling between surface plasmon polaritons and cavity mode excitations. The key role played by surface plasmon polaritons and the necessity for wave vector matching between the incoming ...
A. Secchi, V. Foglietti, E. Cianci, L. Pierno, and M. Dispenza
 CNR-IFN, Italy
 SELEX-SI, Italy
The subject of this work is the design of a LiNbO3 electro-optic tuned Bragg filter to be used as an amplitude modulator. We analyze in detail the realized waveguide and simulate the grating, developing a fabrication methodology for building the Bragg modulator by niobate core etching. Finally, we evaluate the performance of the modulator, using the finite element method analysis.