Optimization of Top Coupling Grating for Very Long Wavelength QWIP Based on Surface Plasmon  

作　　者：Guodong WANG Junling SHEN Xiaolian LIU Lu NI Saili WANG 

机构地区：[1]School of Physics and Electronic Information Engineering, Henan Polytechnic University, No.2001, Shiji road, Jiaozuo, 454003, China [2]School of Electrical Engineering and Automation, Henan Polytechnic University, No.2001, Shiji road, Jiaozuo, 454003, China

出　　处：《Photonic Sensors》2017年第3期278-282,共5页光子传感器（英文版）

基　　金：Acknowledgement This work was supported by the National Natural Science Foundation of China under Grant No. U1304608, the Outstanding Youth Funding of Henan Polytechnic University under Grant No. J2013-05, and Program for Innovative Research Team of Henan Polytechnic University under Grant No. T2015-3.

摘　　要：The relative coupling efficiency of two-dimensional （2D） grating based on surface plasmon for very long wavelength quantum well infrared detector is analyzed by using the three-dimensional finite-difference time domain （3D-FDTD） method algorithm. The relative coupling efficiency with respect to the grating parameters, such as grating pitch, duty ratio, and grating thickness, is analyzed. The calculated results show that the relative coupling efficiency would reach the largest value for the 14.5μm incident infrared light when taking the grating pitch as 4.4 μm, the duty ratio as 0.325, and the grating thickness as 0.07 μm, respectively.The relative coupling efficiency of two-dimensional （2D） grating based on surface plasmon for very long wavelength quantum well infrared detector is analyzed by using the three-dimensional finite-difference time domain （3D-FDTD） method algorithm. The relative coupling efficiency with respect to the grating parameters, such as grating pitch, duty ratio, and grating thickness, is analyzed. The calculated results show that the relative coupling efficiency would reach the largest value for the 14.5μm incident infrared light when taking the grating pitch as 4.4 μm, the duty ratio as 0.325, and the grating thickness as 0.07 μm, respectively.

关 键 词：Very long wavelength QWIP surface plasmon 2D grating 

分 类 号：TN946[电子电信—信号与信息处理] TN256[电子电信—信息与通信工程]