| 用金属小球进行长波量子阱红外探测器的光耦合 |
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| 引用本文： | 熊大元,李志锋,陈效双,李宁,甄红楼,陆卫. 用金属小球进行长波量子阱红外探测器的光耦合[J]. 物理学报, 2007, 56(11): 6648-6653 |
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| 作者姓名： | 熊大元 李志锋 陈效双 李宁 甄红楼 陆卫 |
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| 作者单位： | 中国科学院上海技术物理研究所红外物理国家重点实验室,上海,200083 |
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| 摘 要： | 针对实验中9.5μm峰值响应波长的n型长波量子阱红外探测器设计运用二维金属小球(铜)阵列作光耦合结构.金属小球阵列均匀填充在绝缘的胶黏剂中，基于惠更斯原理研究二维金属小球阵列体系的光耦合和光吸收，结果表明对9.5μm响应波长的长波量子阱红外探测器，采用周期为3μm，半径为0.9μm左右的金属小球阵列可以获得最佳的光耦合.优化设计后的量子效率(66%)远高于45°磨角耦合的量子效率(38%)，为实验运用金属小球阵列进行长波量子阱红外探测器的光耦合提供了基本的理论依据和详细的优化设计方案.
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| 关 键 词： | 长波量子阱红外探测器 金属小球阵列 光耦合 光吸收 |
| 文章编号： | 1000-3290/2007/56(11)/6648-06 |
| 收稿时间： | 2007-03-28 |
| 修稿时间： | 2007-03-28 |
Metal sphere array for long wavelength quantum well infrared photodetectors optical coupling |
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| Xiong Da-Yuan,Li Zhi-Feng,Chen Xiao-Shuang,Li Ning,Zhen Hong-Lou,Lu Wei. Metal sphere array for long wavelength quantum well infrared photodetectors optical coupling[J]. Acta Physica Sinica, 2007, 56(11): 6648-6653 |
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| Authors: | Xiong Da-Yuan Li Zhi-Feng Chen Xiao-Shuang Li Ning Zhen Hong-Lou Lu Wei |
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| Affiliation: | National Laboratory for Infrared Physics,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083 China |
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| Abstract: | A two-dimensional (2D) metal (Copper) sphere array is designed for the optical coupling of 9.5μm 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 3μm period and 0.9μm radius can reach optimal optical coupling for the 9.5μm LW-QWIPs. The maximal quantum efficiency hits 66%, which is highly superior to the conventional 45° angle coupling. The theoretical results provide detailed guidelines for 2D metal sphere array optical coupling for 9.5μm LW-QWIPs. |
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| Keywords: | long-wavelength quantum well infrared photodetectors metal sphere array optical coupling optical absorption |
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