Nanotaper mode converter based on silicon pillar waveguide  

作　　者：易华祥 祝阳 周治平 

机构地区：[1]Wuhan National Laboratory for Optoelectronics,College of Science and Engineering,Huazhong University of Science and Technology [2]State Key Laboratory on Advanced Optical Communication Systems and Networks, Peking University [3]School of Electrical and Computer Engineering,Georgia Institute of Technology

出　　处：《Chinese Optics Letters》2009年第4期312-314,共3页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 60578048 and 60706013);the National Basic Research Program of China (No. 2006CB708310);the Creative Foundation of Wuhan National Laboratory for Optoelectronics(No. P080003).

摘　　要：A two-dimensional （2D） optimized nanotaper mode converter is presented and analyzed using the finite- difference time-domain （FDTD） method. It can convert the mode size in a silicon pillar waveguide （PWG） from 4 μm to 1 μm over a length of 7 μm and achieve a transmission efficiency of 83.6% at a wavelength of 1.55 μm. The dual directional mode conversion of the nanotaper and its ability to perform mode compression and expansion are also demonstrated. The broadband with high transmittance is satisfied in this structure. Using this silicon-based nanotaper, mode conversion between integrated photonic devices can be more compact and efficient.A two-dimensional （2D） optimized nanotaper mode converter is presented and analyzed using the finite- difference time-domain （FDTD） method. It can convert the mode size in a silicon pillar waveguide （PWG） from 4 μm to 1 μm over a length of 7 μm and achieve a transmission efficiency of 83.6% at a wavelength of 1.55 μm. The dual directional mode conversion of the nanotaper and its ability to perform mode compression and expansion are also demonstrated. The broadband with high transmittance is satisfied in this structure. Using this silicon-based nanotaper, mode conversion between integrated photonic devices can be more compact and efficient.

关 键 词：Finite difference time domain method Method of moments Plants (botany) WAVEGUIDES 

分 类 号：TN253[电子电信—物理电子学]