L. Mahler, A. Tredicucci, and F. Beltram
NEST-INFM and Scuola Normale Superiore, Pisa, Italy
We describe the modeling of microdisk lasers displaying vertical emission. The devices are THz quantum cascade lasers with metallic gratings fabricated along the circumference. The emission properties of the fabricated devices are well explained by the model, good mode control is obtained, and the collected power from a patterned device is increased 50 times with respect to unpatterned ...
Modeling of III-Nitride Quantum Wells with Arbitrary Crystallographic Orientation for Nitride-Based Photonics
M. Kisin, R. Brown, and H. El-Ghoroury
Ostendo Technologies, Inc., Carlsbad, CA, USA
A program for self-consistent modeling of electron-hole energy spectrum and space-charge distribution in III-nitride based quantum well (QW) structures has been developed. The model takes into consideration full 6-band description of the valence band states, nonparabolicity of the electron spectrum, quantum confinement of electrons and holes, strain induced modifications of the band structure, ...
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 ...
X. Ni, A. Kildishev, E. Narimanov, and L. Prokopeva
Purdue University, West Lafayette, IN, USA
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 ...
C. Kraeh, and H. Hedler
Siemens AG, Munich
We are developing a solid state gas sensor that combines a small form factor with the high sensitivity of optical gas detection. The gas sensor is based on an optical resonant microsystem that is penetrated by gas molecules. This microsystem consists of an array of vertical rods in air forming a photonic crystal. Light propagates through the photonic crystal along a line defect waveguide. For ...
COMSOL Multiphysics Super Resolution Analysis of a Spherical Geodesic Waveguide Suitable for Manufacturing
H. Ahmadpanahi, D. Grabovi?ki?, J.C. González, P. Benítez, J.C. Miñano
Cedint Universidad Politécnica de Madrid, Madrid, Spain
Recently it has been proved theoretically (Miñano et al, 2011) that the super-resolution up to ? /500 can be achieved using an ideal metallic Spherical Geodesic Waveguide (SGW). This SGW is as a theoretical design, in which the conductive walls are considered to be lossless conductors with zero thickness. In this paper, we study some key parameters that might influence the super resolution ...
Complex K-Bands Calculation for Plasmonic Crystal Slabs by Means of Weak Formulation of Helmholtz's Eigenvalue Equation
G. Parisi, P. Zilio, F. Romanato
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 ...
Y.A. Urzhumov[,], N.I. Landy[,], C. Ciraci, D.R. Smith[,]
Department of Electrical and Computer Engineering, Pratt School of Engineering, Duke University, Durham, NC, USA
Center for Metamaterials and Integrated Plasmonics, Pratt School of Engineering, Duke University, Durham, NC, USA
Linear wave propagation through inhomogeneous structures of size R?? (Fig.1) is a computationally challenging problem, in particular when using finite element methods, due to the steep increase of the number of degrees of freedom as a function of R/?. Fortunately, when the geometry of the problem possesses symmetries, one may choose an appropriate basis in which the stiffness matrix of the ...
Optimized Illumination Directions of Single-Photon Detectors Integrated with Different Plasmonic Structures
M. Csete, Á. Sipos, A. Szalai, G. Szabó
Department of Optics and Quantum Electronics, University of Szeged, Szeged, Hungary
The optimal orientations of different single-photon detector designs were determined by COMSOL software package. Absorption of niobium-nitride (NbN) stripes in two different (p=220 nm, 3p=660 nm) periodic patterns integrated with plasmonic elements was studied. In OC-SNSPDs consisting of ~quarter-photon-wavelength nano-cavity the optimum direction is perpendicular incidence onto NbN stripes in P ...
S. Seif, K. Cadien
Department of Chemical & Materials Engineering, University of Alberta, Edmonton, AB, Canada
One of the major challenges in designing µTEGs is to minimize power loss due to internal resistance (r) of Thermoelectric (TE) materials. To solve this problem we have performed simulation analysis and calculated the internal resistance of eight different TE materials. The internal resistances of these TE materials were then compared to the power generated across the copper electrode as seen in ...