Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Design and Optimization of Multilayer Ideal Cloak

B. Choudhury [1], M.H. Jyothi [1], D. V. Bipin [1],
[1] Centre for electromagnetics, CSIR-National Aerospace Laboratories, Bangalore, Karnataka, India

The development in metamaterial science and technology has created many exhilarating applications from microwave to optical frequency region in which invisibility cloaking is one of the exciting application. In recent years, the RCS reduction characteristics through cloaking structures have been explored by the aerospace researchers, as a novel concept to achieve stealth platform. This paper ...

Effect of Antenna Deformation on Performance

J. Persad [1], S. Rocke [1], A. Abdool [1], D. Ringis [1],
[1] Department of Electrical and Computer Engineering, University of the West Indies, St. Augustine, Trinidad and Tobago

Ubiquitous, unobtrusive wearable computing has tremendous potential for impacting many applications including medical, personal entertainment and surveillance. Advances in the underlying technology have allowed for consistent reduction in the size and weight of emerging solutions, with increasing subsystem integration. A key component for the realisation of these systems is the short and long ...

Modeling Plasmonic Structure Integrated Single-Photon Detectors to Maximize Polarization Contrast

M. Csete [1], A. Szenes [1], G. Szekeres [1], B. Banhelyi [2], T. Csendes [2], G. Szabo [1],
[1] Department of Optics and Quantum Electronics, University of Szeged, Szeged, Hungary
[2] Institute of Informatics, University of Szeged, Szeged, Hungary

Introduction: Single-photon detectors capable of ensuring high fidelity read-out of quantum information delivered via photons of specific polarization are crucial in QIP [1]. Our previous studies have shown that different types of one dimensional plasmonic structures enhance the absorptance of p-polarized light [2, 3]. The purpose of present study was to optimize four different types of ...

Design of a Microreactor for Microwave Organic Synthesis through Microwave Heating Simulations

W. H. Lee[1], K. Jensen[1]
[1]Massachusetts Institute of Technology, Cambridge, MA, USA

We will present the issues of a microreactor setup designed for microwave organic synthesis and demonstrate how COMSOL Multiphysics® is used to understand the mechanism of microwave heating and improve the microreactor design. The RF Module was used for the electromagnetics and solid heat transfer simulations of a CEM Discover microwave unit, while the Heat Transfer and CFD Modules were used the ...

Analysis of 1D, 2D, and 3D Marine CSEM in COMSOL Multiphysics® Software - new

E. C. Luz[1]
[1]Universidade Federal do Pará, Belém, PA, Brazil

The Marine Controlled Source ElectroMagnetic (marine CSEM) is a geophysical method used by the oil industry to investigate resistive targets in the sediments under the ocean floor. In this work we simulate marine CSEM data including 1D, 2.5D and 3D modeling. The results obtained with COMSOL Multiphysics show themselves as a promising tool for the studies of electromagnetic methods in prospecting ...

太赫兹声子极化激元的产生及与金属天线的相互作用

吴强 [1], 潘崇佩 [1], 张琦 [1],
[1] 南开大学,天津,中国

“极化激元”是固体物理学中的重要概念,泛指各种极性元激发与光子的耦合。其中,声子极化激元是指晶格振动的声子与电磁场中的光子相互耦合的一种极化激元波。使用飞秒光在铁电晶体铌酸锂中通过光学非线性效应可产生声子极化激元,其频率位于太赫兹波段,在晶格的振动弛豫、太赫兹光谱、与介观微结构作用等领域已有广泛应用。 声子极化激元涉及电磁场和晶格场的耦合问题,其形式满足黄昆方程。我们使用 COMSOL Multiphysics® 的多物理场(偏微分方程组以及射频模块)模拟了块状铌酸锂晶体中产生声子极化激元波的产生和传输。 铌酸锂晶体作为太赫兹应用的集成化平台,可通过在平板波导上引入微结构实现对太赫兹波的调控。诸多手段中,太赫兹天线作为电磁场的传播场与局域场转换的关键部件,对太赫兹通信和太赫兹光谱等领域都有不可替代的作用。基于这一点,我们设计了一种尖端相对的棒状天线结构,使用 COMSOL ...

基于等效热模型的三维封装快速热仿真技术

唐旻 [1], 冯强强 [1], 董一琳 [1]
[1] 上海交通大学,上海,中国

近年来,三维系统级封装技术逐渐成为人们的关注焦点,是下一代集成电路封装设计最有发展潜力的实现方案。然而,热管理是系统级封装技术需解决的关键问题。图1是典型的系统级封装结构,包含堆叠芯片、硅通孔、封装基板、热界面材料以及多层凸点结构。若对该结构的所有细节进行建模,将会消耗巨大的计算资源,导致分析效率非常低下。因此,本论文将封装中的硅通孔层以及凸点层等复杂结构进行等效处理,提取它们在水平和垂直方向上的等效热导率以及等效比热容、等效密度等参数。例如,在建模过程中,采用 COMSOL Multiphysics® 传热模块对硅通孔层的水平方向等效热导率进行提取,边界设置如图2所示,通过仿真得到的热源端温度来推导等效热导率。类似地,垂直方向的等效热导率提取如图3所示。经过上述处理,可将封装中的硅通孔层以及凸点层等复杂结构等效为介质均匀的材料,然后再采用 COMSOL 进行整体封装结构的热仿真 ...

Shell-Isolated Nanoparticle-Enhanced Raman Spectroscopy: Insight from Simulations with COMSOL Multiphysics® Software

Song-Yuan Ding [1], Jun Yi [1], En-Ming You [1], Zhong-Qun Tian [1],
[1] 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 ...

The Simulation of Motion of a Slider upon a Stator Due to Frictional Force Using COMSOL Multiphysics® Software - new

H. B. Nemade[1]
[1]Indian Institute of Technology Guwahati, Guwahati, Assam, India

The Surface Acoustic Wave (SAW) linear motor was studied which is developed utilizing the friction principle for driving. The principle says that, when a slider is placed on the Rayleigh waves generated on a stator, the slider moves in reverse direction of the wave due to friction between the stator and the slider. A LiNbO3 piezoelectric substrate is used as a stator where comb structured Al ...

Modeling Ex Vivo Microwave Hyperthermia of Different Biological Tissues

H. Kokabi [1], G. Chen [1], N.-E. Belhadj-Tahar [1],
[1] Université Pierre et Marie Curie, Paris, France

Electromagnetic and thermal simulations are achieved using COMSOL Multiphysics® with 2D axisymmetrical finite–element method for a percutaneous microwave hyperthermia system with ex–vivo experiments on different biological tissues. Temperature variation and distribution are studied in the biological tissues submitted to an open ended coaxial cable as microwave applicator. Three types of heat ...