O. D. D. Couto Jr. , A. C. T. Covacevice ,
 Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas, SP, Brazil
In this contribution, we simulate the optical response of piezoelectric planar optical microcavities (POMCs) under the modulation introduced by a propagating surface acoustic wave (SAW). The physical picture of the model is shown in Figure 1. A metallic interdigital transducer (IDT) is placed on the sample surface and, via inverse piezoelectric effect, is responsible for the generation of SAWs ...
Shell-Isolated Nanoparticle-Enhanced Raman Spectroscopy: Insight from Simulations with COMSOL Multiphysics® Software
Song-Yuan Ding , Jun Yi , En-Ming You , Zhong-Qun Tian ,
 State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, iChEM, Xiamen University, Xiamen, China
Surface-enhanced Raman spectroscopy (SERS) has been developed as a versatile tool for trace-molecule detection and biomolecular analysis by coupled gold or silver nanostructures in the past two decades. However, SERS suffers from a long-term limitation of application for surface analysis of general materials. That is because the SERS hotspots in inter-particle nanogap generated from coupled ...
Jiang Xing-fang , Sun Chen-yang , Li Xin-lu ,
 Changzhou University, Changzhou, China
The optical fiber communication has been popular topics besides robot study nowadays. In the process of the Dense Wave-Length Division Multiplexing (DWDM) study, the dispersion compensate for the traditional optical fiber is difficult to solve for long distance transport information. It is hard to solve this problem by experimental study on photonic crystals with high negative dispersion ...
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 ...
COMSOL Multiphysics® Investigation of Radiative and Nonradiative Channels of Quantum Emitter Fluorescence near Hyperbolic Metamaterial
A. Pavlov, V. Klimov, I. Zabkov, D. Guzatov
Lebedev Physical Institute, Moscow, Russia
Moscow Institute of Physics and Technology, Dolgoprudnj, Russia
State University of Grodno, Grodno, Belarus
Effective control over single atom emission might lead to major breakthrough in the field of nanotechnology. It is believed that use of hyperbolic metamaterials (HMM) can be helpful. COMSOL Multiphysics® was used to model interaction of electric dipole with effective HMM and calculate emission rate of dipole in comparison to that value in the absence of metamaterial. Dielectric nanoantennas of ...
N. Katte , P. Evans ,
 Wilberforce University, Wilberforce, OH, USA
 Oak Ridge National Laboratory, Oak Ridge, TN, USA
The extraordinary electromagnetic response of nanostructured material, usually made up of a metallic structures distributed in within a dielectric matrix has attracted a lot of interest in recent years. These materials are technically called metamaterial (MM) since they possess different properties from their constituent materials. Several applications of metamaterials have already been ...
Pryor Knowledge Systems Inc., Bloomfield Hills, MI, USA
This paper presents one approach to the modeling of an abrupt junction PIN photodiode light sensor using COMSOL Multiphysics software and the incorporated SPICE® capability. The current model is built using the capabilities of SPICE in COMSOL Multiphysics 4.0. This model demonstrates the use of SPICE and the AC/DC Module to build a conduction current, rather than an electrostatic, model. This ...
Anna Thomas, Juny Thomas, Deepika Vijayan, K.Govardhan
VIT University, Sensor System Technology, School of Electronics Engineering, Vellore, Tamil Nadu, India
VIT University, MEMS & Sensor Division, School of Electronics Engineering, Vellore, Tamil Nadu, India
The microscopic size of MEMS devices accounts for strong coupling effects which arise between the different physical fields and forces. Micromirrors are essential parts of microswitches in fiber optic network telecommunication. They are usually 1 to 3 mm in size, fabricated from single crystalline silicon and mostly are electrostatically actuated. The objective is to design the micromirror to ...
N. K. Nishchal, A. Fatima, I. Mehra, D. Kumar
Indian Institute of Technology Patna, Patna, Bihar, India
Optical encryption has become a significant research field due to its remarkable advantages [1-5]. The unique features of plasmonics have drawn researchers’ attention towards the role which it can play in information security [3 & 4]. The electric field is greatly enhanced when a metallic nanoparticle is illuminated by an appropriate electromagnetic field. The distribution and enhancement of ...
Pennsylvania State University Electro-Optics Center, Freeport, Pennsylvania, USA
We demonstrate the use of COMSOL Multiphysics with MATLAB to model signal generation in wide-bandgap semiconductor radiation detectors. A quasi-hemispherical detector design is compared with a simple, planar detector. Results show that the quasi-hemispherical design can simply and effectively compensate for the poor hole transport of most compound semiconductor materials. In this paper we ...