| 太赫兹量子阱光电探测器光栅耦合的模拟与优化 |
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| 引用本文： | 张戎,郭旭光,曹俊诚.太赫兹量子阱光电探测器光栅耦合的模拟与优化[J].物理学报,2011,60(5):50705-050705. |
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| 作者姓名： | 张戎 郭旭光 曹俊诚 |
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| 作者单位： | 中国科学院太赫兹固态技术重点实验室,中国科学院上海微系统与信息技术研究所,上海 200050 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)(批准号: 2007CB310402),国家自然科学基金(批准号: 60721004),中国科学院重大基金(批准号: KGCX1-YW-24, KGCX2-YW-231),中国科学院百人计划以及上海市基础研究重点基金资助项目(批准号: 10JC1417000)资助的课题. |
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| 摘 要： | 光栅耦合是量子阱光电探测器探测正入射电磁辐射的常用耦合方法,本文采用模式展开法研究了一维金属光栅太赫兹量子阱光电探测器中的电磁场分布,并给出了器件有源区中的平均光强.研究结果表明,若一维光栅的周期与太赫兹波在器件材料中的波长相当,并且根据器件结构选取合理的光栅占空比,可使器件中的平均光场最强,光栅的光耦合效率最高,从而提高器件的响应率.
关键词：
太赫兹
量子阱光电探测器
光栅
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| 关 键 词： | 太赫兹 量子阱光电探测器 光栅 |
| 收稿时间： | 2010-05-26 |
Simulation and optimization of grating optical coupling of terahertz quantum well photodetector |
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| Zhang Rong,Guo Xu-Guang,Cao Jun-Cheng.Simulation and optimization of grating optical coupling of terahertz quantum well photodetector[J].Acta Physica Sinica,2011,60(5):50705-050705. |
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| Authors: | Zhang Rong Guo Xu-Guang Cao Jun-Cheng |
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| Institution: | Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China |
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| Abstract: | The grating optical coupling method is commonly used for detecting the normal incident light with a quantum well photodetector. In this paper, the distribution of electromagnetic field in one-dimensional metal grating terahertz quantum well photodetectors is studied with modal method, and the average light intensity in the active region is obtained. The result shows that, the light intensity in the device can be optimized when the period of the grating is comparable with the wavelength of the terahertz wave in the sample and a proper filling factor is chosen according to the device structure, which will improve the responsivity of the device. |
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| Keywords: | terahertz quantum well photodetector grating |
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