DUAL-BAND quantum well infrared photodetector with metallic structure

被引:2
|
作者
Wu, Yang [1 ]
Liu, Hongmei [2 ]
Li, Pingzhou [1 ]
机构
[1] Xidian Univ, Sch Phys & Optoelect Engn, Xian 710100, Shanxi, Peoples R China
[2] Shanxi Datong Univ, Inst Solid State Phys, Datong City 037009, Shanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
DQWIP; plasmon resonance; metallic grating;
D O I
10.1117/12.2309926
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The quantum efficiency of the dual bands quantum well infrared photodetectors(QWIP) has been widely concerned in recent years. A novel structure for the dual-band quantum well infrared detectors which is based on GaAs/AlGaAs designed in this paper is aimed to improve the absorption efficiency. The structure replaces the conventional grating with a metallic grating based on surface plasmon polaritons(SPPS), and we further insert a metal structure in the periodic quantum well layer. The simulation result shows that the use of the different shapes of the metal holes can remarkably improve the optical coupling efficiency due to the surface plasmon effect. By optimizing parameters of the structure, it can work in the dual infrared bands of 3-5um and 8-12um. Moreover, the absorption rate increased by 20% compared with traditional structure of Dual-band QWIP.
引用
收藏
页数:6
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