Metal sphere array for long wavelength quantum well infrared photodetectors optical coupling

被引：1

作者：

Xiong Da-Yuan ^{[1
]}

Li Zhi-Feng ^{[1
]}

Chen Xiao-Shuang ^{[1
]}

Li Ning ^{[1
]}

Zhen Hong-Lou ^{[1
]}

Lu Wei ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China

来源：

ACTA PHYSICA SINICA | 2007年 / 56卷 / 11期

关键词：

long-wavelength quantum well infrared photodetectors; metal sphere array; optical coupling; optical absorption;

D O I：

10.7498/aps.56.6648

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A two-dimensional (2D) metal (Copper) sphere array is designed for the optical coupling of 9.5 mu m long-wavelength quantum well infrared photodetectors (LW-QWIPs). The optical coupling is studied based on Huygens' principle. It was shown that a metal sphere array with 3 mu m period and 0.9 mu m radius can reach optimal optical coupling for the 9.5 mu m LW-QWIPs. The maximal quantum efficiency hits 66%, which is highly superior to the conventional 45 degrees angle coupling. The theoretical results provide detailed guidelines for 2D metal sphere array optical coupling for 9.5 mu m LW-QWIPs.

引用

页码：6648 / 6653

页数：6

共 17 条

[1] GRATING-COUPLED QUANTUM-WELL INFRARED DETECTORS - THEORY AND PERFORMANCE [J].