为了提高长波量子阱红外探测器的灵敏度及探测率，采用表面等离激元效应来提高量子阱红外探测器中二维光栅的耦合效率。利用三维时域有限差分算法，分析表面等离激元作用下，长波量子阱红外探测器中二维金属薄膜光栅参数对入射光的调制作用。计算结果表明，对于8 m的入射光，当光栅周期P=2.8 m，孔直径D=1.4 m，光栅层厚度L=0.04 m时，XY平面内Z方向电场值最大，光栅的耦合效率最高。
Abstract
In order to improve the sensitivity and detectivity of the long-wavelength quantum well infrared photodetector (QWIP) ,the surface plasmon was adopted to enhance the optical coupling efficience of two-dimensional grating .The modulation effects of the 2-D metal film grating parameters in long-wavelength QWIP on the incident light were analyzed by using the 3-D finite-difference time-domain (FDTD) algorithm based on surface plasmon. Calculation results shown that the electric field along the Z direction reaches its maximum in the X-Y plane when the grating parameters were taken as P=2.8 m , D=1.4 m and L=0.04 m for 8 m incident light.
关键词
表面等离激元 /
二维光栅 /
耦合效率 /
量子阱红外探测器
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Key words
QWIP /
2-D grating /
surface plasmon polaritons (SPPs) /
coupling efficiency
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基金
国家自然科学基金（U1304608）;河南省高校青年骨干教师支持计划基金（2012GGJS-056）;河南理工大学杰出青年（52013-05）
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参考文献
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金巨鹏，刘丹，王建新，等.320×256 GaAs/AlGaAs长波红外量子阱焦平面探测器[J].红外与激光工程，2012，41(4):833-837.
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[4]Wang Guodong, Dai Shoule, Hui Zhang. Optimization of top coupling grating for mid-wave quantum well infrared photodetector[J
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脚注
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