Design and optimization of evanescently coupled waveguide photodiodes  

作　　者：姚辰 程远兵 伍剑 徐坤 邱吉芳 赵玲娟 王圩 林金桐 

机构地区：[1]Key Laboratory of Information Photonics and Optical Communications,Ministry of Education,Beijing University of Posts and Telecommunications [2]Key Laboratory of Semiconductor Materials Science,Institute of Semiconductors,Chinese Academy of Sciences

出　　处：《Journal of Semiconductors》2011年第10期58-61,共4页半导体学报（英文版）

基　　金：Project supported by the State Key Development Program for Basic Research of China(No.2011CB301702);the National Natural Science Foundation of China(Nos.61006041,61001121,60736036,60932004);the Fundamental Research Funds for the Central Universities

摘　　要：We present the design and optimization of evanescently coupled waveguide photodiodes（EC-WPDs） based on the coupling modes theory and the beam propagation method.Efficient focalization of the optical power in the absorber is achieved by an appropriate choice of index matching layers of EC-WPDs.Numerical simulation shows that high-speed（40 GHz）,high quantum efficiency（81%） and high linearity photodiodes can be achieved, and EC-WPDs are promising devices for future optical communication systems.We present the design and optimization of evanescently coupled waveguide photodiodes（EC-WPDs） based on the coupling modes theory and the beam propagation method.Efficient focalization of the optical power in the absorber is achieved by an appropriate choice of index matching layers of EC-WPDs.Numerical simulation shows that high-speed（40 GHz）,high quantum efficiency（81%） and high linearity photodiodes can be achieved, and EC-WPDs are promising devices for future optical communication systems.

关 键 词：PHOTODIODE coupling modes theory beam propagation method 

分 类 号：TN364.2[电子电信—物理电子学] TN929.11