The enhanced optical coupling in a quantum well infrared photodetector based on a resonant mode of an air-dielectric-metal waveguide

被引：5

作者：

Ding, Jia-yi ^{[1
]}

Chen, Xiao-shuang ^{[1
]}

Li, Qian ^{[1
]}

Tang, Wei-wei ^{[1
]}

Liu, Chang-long ^{[1
]}

Zhen, Hong-lou ^{[1
]}

Jing, You-liang ^{[1
]}

Wang, Han ^{[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：

OPTICAL AND QUANTUM ELECTRONICS | 2015年 / 47卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Periodic gold stripes; Quantum well infrared photodetector; Air-dielectric-metal waveguide resonance; Effective refractive index; Coupling efficiency; PERFORMANCE;

D O I：

10.1007/s11082-014-0115-9

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 hybrid structure consisting of periodic gold stripes and an overlaying gold film is proposed to enhance the optical coupling of a quantum well infrared photodetector. An air-dielectric-metal waveguide is formed when the hybrid structure is integrated on the top of the quantum well detector with the substrate being removed. Finite difference time-domain method is used to numerically obtain the reflection spectrum and the field distribution of the waveguide. The results show that a strong electric field component is induced in parallel to the growth direction of quantum well when the waveguide resonant mode occurs at the detective wavelength of the quantum well infrared photodetector. The relationship between the structural parameters and the resonant wavelength is derived by using the effective refractive index method of the air-dielectric-metal waveguide. A high coupling efficiency can be obtained and the performance of the QWIP can be greatly improved.

引用

页码：2347 / 2357

页数：11

共 33 条

[1] NEAR-UNITY QUANTUM EFFICIENCY OF ALGAAS/GAAS QUANTUM-WELL INFRARED DETECTORS USING A WAVE-GUIDE WITH A DOUBLY PERIODIC GRATING COUPLER [J].