Veröffentlichungen und Präsentationen

Hier finden Sie Veröffentlichungen und Präsentationen der weltweit stattfindenden COMSOL-Konferenzen. In diesen präsentieren Ihre Fachkollegen ihre neuesten mit COMSOL Multiphysics entwickelten Produkte und Ideen. Die Forschungsthemen umfassen ein weites Feld von Industrien und Anwendungsbereichen, die von Mechanik und Elektronik über Strömungen bis zur Chemie reichen. Nutzen Sie die Quick Search, um die zu Ihrem Forschungsbereich passenden Präsentationen zu finden.

A Computational Approach for Simulating p-Type Silicon Piezoresistor Using Four Point Bending Setup

T.H. Tan[1], S.J.N. Mitchell[1], D.W. McNeill[1], H. Wadsworth[2], S. Strahan[2]
[1]Queen's University Belfast, Belfast, United Kingdom
[2]Schrader Electronics Ltd, Antrim, United Kingdom

The piezoresistance effect is defined as change in resistance due to applied stress. Silicon has a relatively large piezoresistance effect which has been known since 1954. A four point bending setup is proposed and designed to analyze the piezoresistance effect in p-type silicon. This setup is used to apply uniform and uniaxial stress along the crystal direction. The main aim of this work is to ...

Characterization of a 3D Photonic Crystal Structure Using Port and S-Parameter Analysis

M. Dong[1], M. Tomes[1], M. Eichenfield[2], M. Jarrahi[1], T. Carmon[1]
[1]University of Michigan, Ann Arbor, MI, USA
[2]Sandia National Laboratories, Albuquerque, NM, USA

We present a 3D port sweep method in a lossy silicon photonic crystal resonator to demonstrate the capabilities of COMSOL Multiphysics® for frequency domain analysis with input and output ports. This method benefits from the advantages of the S-parameter analysis to characterize the input and output coupling into the resonator. By pumping one end of the cavity with a CW plane wave, we are able ...

Surface Plasmon Resonance Sensors: Optimization of Diffraction Grating and Prism Couplers

W. Raja[1], A. Alabastri[1], S. Tuccio[1], R. Proietti Zaccaria[1]
[1]Department of Nanostructures, Istituto Italiano di Tecnologia, Genova, Italy

Surface plasmon resonance (SPR) sensors proved themselves as a promising device for many kinds of applications such as optical biosensing, binding constant determinationor nanofilm thickness measurements. Here we simulate using COMSOL Multiphysics® the light-polaritons coupling for the two most commonly used SPR setups: Attenuated total reflection (Kretschmann configuration) and diffraction ...

Demonstration of All-Optical NAND Logic Gate Using Photonic Integrated Circuits

J. T. Andrews[1], R. Choubey[1], O P Choudhary[1], N. Malviya[1], A. Patel[1], M. Kumar[1], S. Chouksey[1], J. Solanki[1]
[1]National MEMS Design Center, Department of Applied Physics, Shri G S Institute of Technology & Science, Indore 452003 MP, India

A logic gate performs a certain Boolean logic operation on one or more logical inputs and produces a single logical output. The logic values are either “true” or “false.” Logic gates are bistable devices, that is, they may yield one of these two possible stable outputs. The NAND logic is a universal gate; any logic operation can be performed with various combinations of NAND logics. Many ...

Simulation of 2D Photonic Crystal With COMSOL Multiphysics® Software - new

Z. Liang[1], Z. Meng[2], K. Jie[1], Y. Benxi[1]
[1]Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, China
[2]Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China

This paper introduces the concept, research methods and application of photonic crystals. Starting from Maxwell's equations, the functional form of the TE mode and TM mode of the 2D crystal is derived. In 2D crystal, according to the functional forms, we conduct some stimulation about two-demensional photonic crystal with line-defect and dot-defect, forming some results as following: 1. ...

Improving Detection Sensitivity for Nanoscale Targets Through Combined Photonic and Plasmonic Techniques

G. Zhang[1], Y. Zhao[1]
[1]Clemson University, Clemson, SC, USA

Photonic technique such as the whispering gallery mode (WGM) is often used for detection of small particles like bacteria and viruses. It offers good detection sensitivity and is advantageous over other detection techniques because the detection can be label free. However, the detection sensitivity may not be sufficient when the size of the detection target is in nanoscale. To change this, we use ...

Antenna and Plasmonic Properties of Scanning Probe Tips at Optical and Terahertz Regimes - new

A. Haidary[1], P. Grütter[1], Y. Miyahara[1]
[1]Physics Department, McGill University, Montreal, QC, Canada

A wide variety of near-field optical phenomena such as apertureless near-field scanning microscopy (ANSM) at optical and terahertz (THz) regimes and surface enhanced Raman scattering relies on the electric field enhancement at the end of a sharp tip. Achieving and controlling this electric field enhancement is a key challenge for a wide range of applications such as surface modification, data ...

Efficient Simulation of 3D Electro-optical Waveguides Using the Effective Refractive Index Method

M. Herlitschke, M. Blasl, and F. Costache
Fraunhofer Institute for Photonic Microsystems
Dresden, Germany

3D FEM simulation of millimeter-scale, complex electro-optically induced waveguide based devices demands the use of grids with more than several million nodes. Hence the simulation could take substantial time and require large amounts of available memory. This paper presents a computation algorithm based on the conversion of an initial 3D waveguide structure into an analogous 2D structure, ...

Analysis Of Linearly Polarized Modes

I. Avram, and I. Gavril Tarnovan
The Technical University of Cluj Napoca
Cluj, Romania

This paper presents a study on the propagation modes of electromagnetic waves through a step index fiber optics. To analyze the propagation of electromagnetic field, a simulation in Comsol 4.0 has been implemented using two different optical fibers. Obtaining the propagation modes, called linearly polarized modes (LPnm) to get their characterization according to the radial and azimuthal ...

Enhanced Surface Plasmon Polariton Propagation Induced by Active Dielectrics - new

M. Mattheakis[1], C. Athanasopoulos[1], G. P. Tsironis[1]
[1]University of Crete, Heraklion, Greece

We present numerical simulations for the propagation of surface plasmon polaritons in a dielectric-metal-dielectric waveguide using COMSOL Multiphysics® software. We show that the use of an active dielectric with gain that compensates metal absorption losses enhances substantially plasmon propagation. Furthermore, the introduction of the active material induces, for a specific gain value, a ...

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