In questa sezione troverete i lavori presentati alle Conferenze mondiali COMSOL. Le presentazioni descrivono ricerche e prodotti innovativi progettati con COMSOL Multiphysics da colleghi di tutto il mondo. I temi delle ricerche presentate abbracciano un'ampia gamma di settori produttivi e aree applicative, in ambito elettrico, meccanico, fluidodinamico e chimico. Lo strumento di Ricerca Rapida vi permetterà di trovare le presentazioni che si riferiscono all'area di vostro interesse.

Silicon-Organic-Hybrid Independent Simultaneous Dual-Polarization Modulator: Device Theory and Design

Y. D'Mello [1], M. Hui [1], J. Skoric [1], M. Haines [1], A. Kirk [1], M. Andrews [1], D. Plant [1],
[1] McGill University, Montréal, QC, Canada

The Complementary Metal-Oxide-Semiconductor (CMOS) technology is a gateway to fabricating low cost electronic and photonic components to date. The Silicon-based nanophotonics platform leverages CMOS technology to fuel the effort to provide increasingly high-speed and high-bandwidth devices at low costs in response to global demands in telecommunication infrastructure. The current industry ...

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 ...

Analysis of Magnetic Resonance in Metamaterial Structure

C. Rajni[1], and A. Marwaha[2]
[1] Shaheed Bhagat Singh College of Engineering And Technology, Ferozepur, Punjab, India
[2] Sant Longowal Institute of Engineering And Technology, Sangrur, Punjab, India

‘Metamaterial’ is one of the most recent topic in several areas of science and technology due to its vast potential in various applications. These are artificially fabricated materials which exhibit negative permittivity and/or negative permeability. The unusual electromagnetic properties of metamaterial has opened more opportunities for better antenna design to surmount the limitations of ...

Study of Energy Transfer Mechanism for a Synchrotron X-ray Gas Absorber with COMSOL Multiphysics

A. Martín Ortega [1], Y. Dabin [1], T. Minea [2], A. Lacoste [3]
[1] ESRF, Grenoble, France
[2] LPGP, Université Paris-Sud XI, Orsay, France
[3] LPSC, Université Joseph Fourier, Grenoble, France

The high power of X-ray beam delivered by synchrotrons and free electron lasers, up to 240 W/mm2, requires heat load management solutions to obtain the best performance from the optical elements which will shape the beam for its use in the experimental stations [1]. One solution is the use of gas attenuators: a tube filled with an inert gas, usually Argon or Krypton, is placed between X-ray ...

Absorption and Scattering of Gold Nanoparticles

I. Bariakhtar [1],
[1] Boston College, Chestnut Hill, MA, USA

The interest to study the nanoparticles absorbed on the substrate is caused by the multiple practical applications of such systems [1, 2]. The author suggests a method of examining their properties by calculating the absorption and scattering of the electromagnetic field by such system [3,4,5]. It was shown that the Raman scattering and the light absorption can be increased by orders with the ...

Analysis of Super Imaging Properties of Spherical Geodesic Waveguide Using COMSOL Multiphysics

D. Grabovi?ki?[1], J.C. González[1], P. Benítez[1], J.C. Miñano[1]
[1]Cedint Universidad Politécnica de Madrid, Madrid, Spain

Negative Refractive Lens (NRL) has shown that an optical system can produce images with details below the classic Abbe diffraction limit. This optical system transmits the electromagnetic fields, emitted by an object plane, towards an image plane producing the same field distribution in both planes. Recently, two devices with positive refraction, the Maxwell Fish Eye lens (MFE) (Leonhardt et al. ...

Simulation of Photonic Crystals Particle Filling by Electrospray

A. Coll, V. Di Virgilio, S. Bermejo, and L. Castañer
Universitat Politècnica de Catalunya, Barcelona, Spain

Photonic crystals are widely used in optical applications as waveguides and band filters. Filling the periodic structural material of photonic crystals with other materials is very useful in order to change the optical properties of the devices. In this paper electrostatic COMSOL simulations describing an electrospray deposition of particles in macroporous structures are performed.

Dual Phononic And Photonic Band Gaps In A Periodic Array Of Pillars Deposited On A Membrane

Y. Pennec, Y. El Hassouani, C. Li, B.D. Rouhani, E.H. El Boudouti, H. Larabi, and A. Akjouj
Institut d’Electronique, de Microélectronique et de Nanotechnologie, Université de Lille, Villeneuve d’Ascq, France

Phononic crystals are a class of materials that exhibit periodic variations in their density and elastic properties. Such crystals modify the propagation of acoustic waves and prohibit the propagation of sound for frequencies within the band gap. We discuss the simultaneous existence of phononic and photonic band gaps in a periodic array of silicon pillars deposited on a homogeneous SiO2 ...

Direct and Indirect Coupling Mechanisms in a Chiral Plasmonic System

Zhongyue Zhang [1], Yuyan Chen [1],
[1] School of Physics and Information Technology, Shaanxi Normal University, Xi’an, China

手性等离激元纳米结构被广泛研究并用于生物监测、分析化学和负折射率介质方面。在该结构中直接耦合的机制已经在相关研究中被发现。我们提出由金膜分隔两个金纳米棒(TNMF)的结构(图1),并发现了间接耦合机制。 在 COMSOL Multiphysics® 中,射频电磁波,频域接口用于求解正弦时变电磁场分布,选此接口计算 TNMF 结构的光学响应。插值函数用来设置金的折射率;设置边界条件模拟周期性结构阵列。结果可通过端口2对端口1的响应获得,并可查看每个数据点的电场、电荷等分布。应用程序库中射频模块的“Plasmonic wire grating”教程是初始指导我们计算纳米结构的例子。 用软件模拟圆偏振光照射,得到透射曲线和圆二色性(CD)曲线(图2)。加入金膜的结构产生新模式2。通过 B-K 模型分析电荷分布(图3),发现模式1是直接耦合,模式2是间接耦合。对间接耦合模式,上 ...

Design of a Nucleic Acid Biosensor Using COMSOL Multiphysics®

L. Velmanickam [1], D. Nawarathna [1], V. Jayasooriya [1],
[1] Department of Electrical and Computer Engineering, North Dakota State University, Fargo, ND, USA

Cancer is one of the leading causes of deaths worldwide. According to the American Cancer Society, there will be about 700,000 cancer related deaths in US in 2017. Cancer mortality will be reduced if it is detected and treated at the early stages. Previous studies have shown that biomarkers can be used as an effective pointer for detection of cancer at very early stages. Bio sensing techniques ...