Determination of the Optical Properties of Individual Gold Nanorods through Numerical Modeling and Experiment
Y. Davletshin, J.C. Kumaradas
Ryerson University, Toronto, ON, Canada
The optical scattering and absorption of gold nanorods (GNRs) depends on its size, shape, and surroundings. This dependence is due to both intrinsic and extrinsic effects. A good understanding of this dependence is needed for applications of GNRs in photo-thermal therapy, optical and opto-acoustic imaging, biosensing, and other photonic areas. Extrinsic effects are caused by the production of ...
FE Modeling of Surfaces with Realistic 3D Roughness: Roughness Effects in Optics of Plasmonic Nanoantennas
J. Borneman, A. Kildishev, K. Chen, and V. Drachev
School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana, USA
COMSOL Multiphysics has been widely used to model the near and far-field electromagnetics (specifically, transmission and reflection spectra) of gold and silver nanoantenna arrays. We use a moving 3D mesh, thus preserving the DOF number and simply morphing the structure of the mesh to accommodate the moving boundary. The electromagnetics model consist of four multiphysics models, two ...
Non-Equilibrium Quantum Well Populations and Optical Characteristics of III-Nitride Lasers and Light-Emitting Diodes
M. Kisin, and H. El-Ghoroury
Ostendo Technologies, Inc.
COMSOL-based Ostendo’s Optoelectronic Device Modeling Software (ODMS) has been updated to include effects of non-equilibrium QW populations in semiconductor light-emitting and laser diodes. III-nitride light emitters with different levels of polarity have been compared as an illustrative example of ODMS performance. Modeling proved that high intra-QW recombination rates in III-nitride light ...
C. Soares, N. Padoin, A. C. Zimmermann, G. Cunha, P. B. Uliana, M. Wendhausen
Federal University of Santa Catarina, Florianópolis, SC, Brazil
PowerOpticks Technology Ltda, Florianópolis, SC, Brazil
In this study, COMSOL Multiphysics® software was applied to the investigation of the electromagnetic behavior of an optical crystal submitted to the magnetic field generated by electric current in a near positioned metallic conductor. Moreover, the influence of a ferromagnetic apparatus (magnetic concentrator) on the magnetic field acting upon the crystal was investigated. Three cases were ...
TM Wave Propagation in Optical Nanostructures with a Third-Order Nonlinear Response: Modeling and Validation with COMSOL
A. Kildishev, E. E. Narimanov
Birck Nanotechnology Center, School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana, USA
An enhanced method is used for analysis of third-order nonlinearities in optical nanostructures with scalar TM (H-field) frequency domain formulation. After embedding it in COMSOL Multiphysics it is shown to produce fast and accurate results without superfluous vector E-field formalism. A standard TM representation based on cubic non-linear susceptibility χ(3) results in an intractable ...
N. Katte, J. Haus, J.B. Serushema, and M. Scalora
University of Dayton, Dayton, OH, USA
Charles M. Bowden Research Center, Redstone Arsenal, AL, USA
We show that diffraction can be suppressed in a one-dimensional metallodielectric stack (MDS) at visible wavelengths to achieve super-resolution imaging. In our calculations we use two popular techniques, which can be adapted to investigate the imaging properties of MDSs. The two methods are the transfer matrix method (TMM) and the Finite element method based software, COMSOL Multiphysics. The ...
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 ...
A. Pors, O. Albrektsen, S.I. Bozhevolnyi, and M. Willatzen
Mads Clausen Institute, University of Southern Denmark, Sønderborg, Denmark
Institute of Sensors, Signals and Electrotechnics, University of Southern Denmark, Odense, Denmark
The use of plasmonic effects to dramatically enhance the electromagnetic field near the surface of a metallic nanostructured surface has grown into a large research area in the effort to take advantage of the surface enhanced field. In this paper the electromagnetic field near a nano-sized truncated spherical cavity embedded in a gold substrate is investigated and modeled in 3D with COMSOL ...
Soochow University, Suzhou, China
In this section, we design an invisible cloak using the composite medium of silver nanowires with elliptical cross-sections embedded in a polymethyl methacrylate host. Under the guidance of an analytical effective medium approach, we use the parameter retrieval method to design a well-performed invisible cloak, based on an empirical revised version of the reduced cloak. The cloak is numerically ...
A. Alabastri, R. Krahne, A. Giugni, G. Das, R. P. Zaccaria, M. Zanella, I. Franchini, and E. di Fabrizio
Italian Institute of Technology (IIT)
We studied the optical phonon excitations (LO) of ordered arrays of dot/ rod core-shell CdSe/ CdS nanorods by Raman spectroscopy. Upon deposition on planar substrates the nanorods formed super-lattice structures via side-by side assembly into tracks over some microns of length. COMSOL Multiphysics software has been used to calculate the magnitude of the electric field generated by the ...