نتایج جستجو برای: cylindrical 2d fdtd

تعداد نتایج: 110143  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده علوم پایه 1391

لیزرهای مایکروکاواک، شامل نانوذراتی نظیر نقاط کوانتومی، شاهکار تزویج قوی و محبوس سازی فوتون ها در یک کاواک نوری با ابعاد تقریبی طول موج نوری هستند. مایکرو و نانوکاواک های لیزری به علت کنترل بسیار خوب مدهای لیزری، برای بازده زیاد، جریان آستانه کم، سرعت زیاد و نویز کم، از سایر لیزرها متمایز شده اند. در این پایان نامه طراحی، شبیه سازی و تحلیل نانولیزربلورفوتونی فوق سریع، به عنوانیکی از مهمترین اد...

2012
Priyanka Malik Rishu Chaujar Mridula Gupta R. S. Gupta

In this paper, for the first time, a two-dimensional (2D) analytical drain current model for sub-100 nm multi-layered gate material engineered trapezoidal recessed channel (MLGMETRC) MOSFET: a novel design is presented and investigated using ATLAS and DEVEDIT device simulators, to mitigate the large gate leakages and increased standby power consumption that arise due to continued scaling of SiO...

2004
Kartik Srinivasan Oskar Painter

Current quantum cascade lasers based upon conduction band electron transitions are predominantly TM (electrical field normal to the epitaxial direction) polarized. Here we present a study of localized defect modes, with the requisite TM polarization, in connected square and hexagonal lattice twodimensional (2D) photonic crystals for application as quantum cascade laser resonators. A simple grou...

Journal: :Comput. Graph. Forum 2010
Christian Rieder Andreas Weihusen Christian Schumann Stephan Zidowitz Heinz-Otto Peitgen

Teaser Figure: A volume rendering with the corresponding tumor map, a pseudo-cylindrical mapping of the tumor surface. Percutaneous radiofrequency (RF) ablation is a minimally invasive, image-guided therapy for the treatment of liver tumors. The assessment of the ablation area (coagulation) is performed to verify the treatment success as an essential part of the therapy. Traditionally, preand p...

2011
Yasushi Inoguchi Tan Yiyu Yukinori Sato Makoto Otani Yukio Iwaya Hiroshi Matsuoka Takao Tsuchiya

Sound field simulation is widely used for acoustic design; however, this simulation needs many computational resources. On the other hand, FPGA becomes major for acceleration. To take advantage of hardware acceleration by FPGA, hardware oriented algorithm which consumes small number of gates and memory is necessary. This paper addresses hardware acceleration of sound field simulation using FPGA...

2012
M. L. Liu M. J. Yun F. Xia W. J. Kong Y. Wan J. Liang W. Lv H. Y. Tan

In this paper, super-resolution imaging and negative refraction by a two-dimensional (2D) triangular lattices graded photonic crystal (GPC) were studied. The graded photonic crystal (GPC) was obtained by varying the radius in each row so that its effective refractive index changes along the transverse direction. By using Plane Wave Expansion (PWE) method and Finite-Difference Time-Domain (FDTD)...

Journal: :Optics express 2008
Ahmad R Zain Nigel P Johnson Marc Sorel Richard M De La Rue

We present experimental results on photonic crystal/photonic wire micro-cavity structures that demonstrate further enhancement of the quality-factor (Q-factor)--up to approximately 149,000--in the fibre telecommunications wavelength range. The Q-values and the useful transmission levels achieved are due, in particular, to the combination of both tapering within and outside the micro-cavity, wit...

2014
Gloria Joseph

We introduce a new configuration of optical NOR logic gateimplementedby using two symmetric circular shaped photonic crystal ring resonator made of dielectric Indium Phosphide rods in air substrate. The switching behavior of proposed optical gate was analyzed based on beam interference principle and perturbation theory. Numerical calculations were carried out by optiFDTD tool using a 2D FDTD do...

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