Optimization of trapezoid coupling grating for long-wave quantum well infrared photodetector

摘要：

　　The relative coupling efficiency of trapezoid coupling grating for long-wave quantum well infrared photodetector is calculated by finite difference time domain algorthms.By considering the lateral etching effects in grating fabrication,the relative coupling efficiency with respect to the grating parameters,such as,grating period,grating depth,grating top width and grating bottom width etc,is computed.The calculated results show that the relative coupling efficiency will reach the largest value for the 8.266μm incident infrared light when taking grating period asp =2.55μm,grating depth as h =0.622μm,grating top width as d1 =1.253μm,grating bottom width as d2 =0.626μm,duty ratio as q =0.5 and the ratio of bottom width and top width as α =0.5.

关键词： QWIP Trapezoid coupling grating FDTD

作者: Rui Wang Yingli Yang Guodong Wang Yingying Liu

作者单位: School of Electrical Engineering and Automation,Henan Polytechnic University,No.2001,Shiji Road,Jiao School of Computer Science and Technology,Henan Polytechnic University,No.2001,Shiji Road,Jiaozuo 45

会议类型: 国际会议

会议名称: 2012 International Meeting on Opto-Electronics Engineering and Materials Research(OEMR2012)(2012光电工程与材料国际会议)

会议地点: 沈阳

会议语种:英文

页码: 252-255

在线出版日期: 2012-07-27（万方平台首次上网日期，不代表论文的发表时间）