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.

Demonstration of a Novel Surface Plasmon Based Interferometer with COMSOL

D. Carrier, and J.J. Dubowski
Université de Sherbrooke, Sherbrooke, QC, Canada

In order to provide swift and precise diagnostics, physicians and medical doctors require an adequate amount of information about the patient\'s condition. An integrated SPR (surface plasmon resonance) biosensing platform is currently developed by our research group with the aim of preserving compatibility with microfabrication techniques, open-ended surface and integrated light source. In order ...

Modeling of an Optical Black Hole with True Gaussian Beam Incidence

X. Ni[1], A. Kildishev[1], E. Narimanov[1], and L. Prokopeva[2]
[1]Purdue University, West Lafayette, IN, USA
[2]Russian Academy of Sciences, Novosibirsk, Russia

We model an ideal optical black hole device in COMSOL Multiphysics as an electromagnetic scattering problem. The device is illuminated with a Gaussian beam which is focused at a fixed position in horizontal direction (x0) and different positions in vertical direction (y0). The device is modeled as a cylindrical system with a gradient-index shell and absorbing core. Using the classical paraxial ...

Coupling Picosecond Terahertz Pulses to a Scanning Tunneling Microscope

P. H. Nguyen [1], C. Rathje [2], G. J. Hornig [1], V. Jelic [1], C. Ropers [2], F. A. Hegmann [1],
[1] University of Alberta, Edmonton, AB, Canada
[2] 4th Physical Institute, University of Göttingen, Göttingen, Germany

Probing ultrafast processes over subpicosecond and picosecond time scales provides fundamental insight into the nature of materials. We have experimentally demonstrated terahertz (THz)-pulse-induced tunneling in a scanning tunneling microscope (THz-STM) to image surfaces with simultaneous nanometer spatial resolution and subpicosecond time resolution [1]. However, the exact mechanism by which ...

Periodic Near-field Enhancement on Metal-Dielectric Interfacial Gratings at Optimized Azimuthal Orientation

M. Csete[1,2], X. Hu[1], A. Sipos[2], A. Szalai[2], A. Mathesz[2], and K. Berggren[1]

[1]Research Laboratory of Electronics, Nanostructures Laboratory, Massachusetts Institute of Technology, Massachusetts, USA
[2]Department of Optics and Quantum Electronics, University of Szeged, Szeged, Hungary

The effect of plasmon-wavelength scaled gratings on the surface plasmon resonance is studied experimentally and theoretically. The model samples are multi-layers containing laser fabricated gratings at bimetal-polymer interfaces. Dual-angle dependent surface plasmon resonance measurements are performed illuminating the samples by monochromatic light in Kretschmann arrangement. The double ...

Complex K-Bands Calculation for Plasmonic Crystal Slabs by Means of Weak Formulation of Helmholtz's Eigenvalue Equation

G. Parisi[1], P. Zilio[1], F. Romanato[1]
[1]University of Padova, Padova, Italy

We present a Finite Element Method (FEM) to calculate the complex valued k(?) dispersion curves of a photonic crystal slab in presence of both dispersive and lossy materials. In particular the method can be exploited to study plasmonic crystal slabs. We adopt Perfectly Matched Layers (PMLs) in order to truncate the open boundaries of the model, including their related anisotropic permittivity ...

Electromagnetic Parameters Extraction for Integrated-Circuit Interconnects for Open Three Conductors with Two Levels Systems

S.M. Musa[1], M.N.O. Sadiku[1], J.D. Oliver[1]
[1]Prairie View A&M University, Prairie View, TX, USA

The accurate estimate of values of electromagnetic parameters are essential to determine the final circuit speeds and functionality for designing of high-performance integrated circuits and integrated circuits packaging. In this paper, a new quasi-TEM capacitance and inductance analysis of multiconductor multilayer interconnects is successfully demonstrated using the finite element method (FEM) ...

Solving the Paraxial Wave Equation using COMSOL

P. Mikulski, K. Mcilhany, and R. Malek-Madani
United States Naval Academy
Annapolis, MD

Here we present and discuss numerical solutions to the paraxial wave equation using COMSOL (2D, PDE, General Form, time-dependent analysis). Ultimately, the goal is to extend this treatment of free-space beam propagation to the case of propagation through a medium that is non-uniform and subject to non-linear effects where the beam itself is modifying the properties of the medium in which it is ...

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 ...

Purcell Effect via Numerical Simulation - new

I. Zabkov [1], V. Klimov[1], A. Pavlov[1], D. Guzatov[2]
[1]All-Russia Research Institute of Automatics (VNIIA), Moscow, Russia
[2]Yanka Kupala State University of Grodno, Grodno, Belarus

As it is known nano-sized emitters (such as atoms, quantum dots and point defects in diamonds) interaction with nano-environment leads to drastic changes of their decay rate and therefore lifetime (Purcell effect). To calculate the influence in general one needs to solve equations of quantum electrodynamics. However in weak interaction limit these emitters can be considered as point electric ...

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 ...