Shilong Li ,
 Shanghai Institute of Technical Physics (SITP), Shanghai, China
By using a combination of top-down and bottom-up strategies (see Fig. 1), rolled-up optical microcavities have gained considerable attention owing to their excellent customizability . For example, the resonant spectrum of a rolled-up optical microcavity is well defined by simply tailoring the rolling length before it rolls , as shown in Fig. 2. In order to have a good visualization for the ...
P. Cendula , J. O. Schumacher ,
 Institute of Computational Physics, Zurich University of Applied Sciences, Winterthur, Switzerland
A photoelectrochemical (PEC) cell uses solar energy to split water to hydrogen and oxygen in single integrated device. Electrochemical impedance spectroscopy is a suitable tool to characterize recombination and reaction mechanisms in PEC cell. Full numerical drift-diffusion calculations of the electrochemical impedance were conducted. The linear dependence of abscissa (real part) in Nyquist ...
S. Kaim, B. Anderson, G. Venus, J. Lumeau, V. Smirnov, B. Zeldovich, L. Glebov
CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL, USA
OptiGrate Corp, Oviedo, FL, USA
Forced airflow cooling of a Volume Bragg Grating heated by a laser beam was investigated by means of simulation with COMSOL Multiphysics®. In addition to air cooling of unrestricted airflow, a case of airflow directed by limiting glass plates was investigated. A number of temperature distributions and thermal deformations were obtained in simulations for different rates of airflows. Simulations ...
M. Csete , A. Szenes , L. Zs. Szabó , G. Szabó , T. Csendes , B. Bánhelyi ,
 Department of Optics and Quantum Electronics, University of Szeged, Szeged, Hungary
 Institute of Informatics, University of Szeged, Szeged, Hungary
Detecting light emitted by fluorescent molecules with resolution down to single photon is an important problem in various fields of sciences and applications, such as solid-state physics, quantum information processing and medicine. The detection probability can be improved via enhancement of excitation and emission. Enhancement both of these processes can be reached by localized surface plasmon ...
胡德骄 , 庞霖 , 杜惊雷 ,
Introduction: A metal film whose thickness is smaller than the skin depth, is of high transmission in the visible and half-transparent in the near infrared. However, when the film is divided into discrete nano-strips (i.e. array), an enhanced anomalous reflection and suppressed transmission take place. It was reported that this phenomenon is attributed to the Localize Surface Plasmon Resonance ...
E. Furlani, and A. Baev
The Institute for Lasers, Photonics and Biophotonics, University at Buffalo, Buffalo, NY, USA
We study cylindrical and spherical shell structures that have cloaking material properties proposed by Pendry et al. We use 2D and 3D time-harmonic analysis to study the field distribution and power flow for various arrangements of these structures. We have shown that the COMSOL RF solver is well suited for the analysis of cloaking metamaterial structures If cloaking material properties can be ...
M. Gabalis, D. Urbonas, R. Petruskevicius
Institute of Physics of Center for Physical Sciences and Technology, Vilnius, Lithuania
In this work perforated microring resonator based refractive index sensor is presented. Numerical analysis of the microring using COMSOL Multiphysics® was performed. From transmission spectra sensitivity and quality factor of our proposed structure were evaluated. It was shown that perforated microring resonator exhibits higher sensitivity than ordinary microring resonator while also maintaining ...
Modelling Ultra-short Pulse Laser Ablation of Dielectric Materials Using multiple Rate Equations - new
P. Boerner, K. Wegener
Institute of Machine Tools and Manufacturing, ETH Zurich, Zurich, Switzerland
Ultrafast lasers are widely applied in micromachining, material science and physics. In industry, picosecond lasers are becoming more and more established. For pulse lengths shorter than the electron-phonon coupling time, heat affected zones are negligible. Thermally sensitive materials can be processed using ultrashort pulse laser radiation. Multi-component materials and poorly absorbing ...
S. Almousa , J. A. Deibel ,
 Department of Physics, Wright State University, Dayton, OH, USA
While low frequency light is poorly transmitted through an aperture in a conductive thin film, in the phenomenon known as extraordinary optical transmission (EOT), a narrow band of selected frequencies are transmitted when incident on an array of subwavelength periodic apertures where the resonant frequency is determined by the geometry of the aperture array and the metal-dielectric interface ...
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, ...