R. Singh, and I. Jose
BITS Pilani Goa Campus
Diffuse Optical Tomography (DOT) uses Near Infra-red (NIR) light to monitor physiological changes in internal organs. NIR light being less energetic in nature can be used for continuous monitoring of tumor infected biological tissue, neonatal brain and many such applications where high energy radiation can cause severe damage. The forward problem of DOT, which involves obtaining of the ...
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 ...
COMSOL Multiphysics® Investigation of Radiative and Nonradiative Channels of Quantum Emitter Fluorescence near Hyperbolic Metamaterial
A. Pavlov, V. Klimov, I. Zabkov, D. Guzatov
Lebedev Physical Institute, Moscow, Russia
Moscow Institute of Physics and Technology, Dolgoprudnj, Russia
State University of Grodno, Grodno, Belarus
Effective control over single atom emission might lead to major breakthrough in the field of nanotechnology. It is believed that use of hyperbolic metamaterials (HMM) can be helpful. COMSOL Multiphysics® was used to model interaction of electric dipole with effective HMM and calculate emission rate of dipole in comparison to that value in the absence of metamaterial. Dielectric nanoantennas of ...
A. Martín Ortega , Y. Dabin , T. Minea , A. Lacoste 
 ESRF, Grenoble, France
 LPGP, Université Paris-Sud XI, Orsay, France
 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 . One solution is the use of gas attenuators: a tube filled with an inert gas, usually Argon or Krypton, is placed between X-ray ...
N. K. Nishchal, A. Fatima, I. Mehra, D. Kumar
Indian Institute of Technology Patna, Patna, Bihar, India
Optical encryption has become a significant research field due to its remarkable advantages [1-5]. The unique features of plasmonics have drawn researchers’ attention towards the role which it can play in information security [3 & 4]. The electric field is greatly enhanced when a metallic nanoparticle is illuminated by an appropriate electromagnetic field. The distribution and enhancement of ...
Wang Lei ,
 Nanjing University of Posts and Telecommunications, Nanjing, China
Metamaterial-based absorbers play a significant role in applications ranging from energy harvesting and thermal emitters to sensors and imaging devices. The middle dielectric layer of conventional metamaterial absorbers has always been solid. Researchers could not detect the near field distribution in this layer or utilize it effectively. Here, we use anisotropic liquid crystal as the dielectric ...
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 ...
J. T. Andrews, S. Chaurasiya, O. P. Chaudhary, D. Agarwal
National MEMS Design, Department of Applied Physics, Shri G S Institute of Technology & Science, Indore Madhya Pradesh, India
By introducing a periodic modulation in a waveguide, it is possible to create an interaction between forward-traveling and backward-traveling modes of an optical waveguide. Bragg grating may be a one dimensional diffraction grating which diffracts light from the forward-traveling mode into the backward traveling mode. Since the Bragg grating reflects at the wavelength for which it is ...
A. Shetty, K. J. Vinoy, S. B. Krupanidhi
Electrical Communication Engineering, Indian Institute of Science, Bangalore, India
Materials Research Centre, Indian Institute of Science, Bangalore, India
As interest in the electromagnetic spectrum expands towards the infrared and terahertz range, the distinct advantages of using semiconductors instead of metals for plasmonic applications must be understood. Plasmonic resonances in gold (Au) and indium nitride (InN) gratings are studied, in the terahertz (?=30µm) regime. The electromagnetic properties of Au and InN are described by the Drude ...
庾金涛 , 李清灵 , 房陈岩 ,
随着我国国民经济的持续高速发展，生活与生产的用电量越来越大，电力行业的规模日益增大。电力设备在不正常工作时，大多会产生电弧电晕，通过检测电晕电弧等目标，就可以获知电力系统设备的损害程度。然而，目前并没有对真实的电弧电晕目标进行非光子计数方式的定量化研究。本文作者研制了一套紫外外波段的面阵成像探测系统，对实验室人工制造的高电压电弧电晕目标进行了相关的分析与实验研究。 利用 COMSOL Multiphysics® 的等离子体物理场接口的 DC 放电接口，对实验所用的天梯仪器的放电行为建模，分子碰撞数据选择大气压下的空气模型，对电晕放电辉光主要贡献的成分N2+，进行密度分布计算，结果换算成光强，得到定性的光强分布，与相机拍摄结果对比。 自制的一套紫外面阵成像系统，对由实验室高压设备在空气中产生的电弧电晕目标开展了紫外成像实验，对电弧电晕目标在 200-1000nm ...