THzQWP二维光栅耦合效率的理论分析研究  

Two-dimensional grating coupling efficiency of THzQWP

作　　者：王国东[1] 王赛丽[1] 朱红伟[1] 倪璐[1] 乔振朋 

机构地区：[1]河南理工大学电气工程与自动化学院,焦作454003

出　　处：《应用光学》2015年第5期807-810,共4页Journal of Applied Optics

基　　金：国家自然科学基金(U1304608);河南理工大学杰出青年基金资助(J2013-05)

摘　　要：将二维金属光栅结构引入到探测器结构中,以提高太赫兹(THz)量子阱光电探测器的探测率。采用三维时域有限差分算法,建立了THz量子阱光电探测器的二维金属光栅仿真模型,详细分析了二维金属光栅参数对太赫兹量子阱光电探测器的电场强度的影响。仿真分析结果表明:当入射光频率为6.27THz(相对应波长为47.847μm)、光栅周期P=10.5μm、占空比=0.55(金属块宽度w=5.755μm)、光栅层厚度h=0.4μm时,器件中的Z方向上的电场值最大,光栅的耦合效率最高。The two-dimensional(2D)metallic grating was introduced into the detector to improve the detection rate of Terahertz(THz)quantum well photodetector(QWP).The 2Dmetal grating simulation model of THz QWP was established by using the 3Dfinite-difference timedomain algorithm,the impact on the electric field strength of the 2D metal grating parameters of THz QWP was analyzed detailed.The results show that for the 6.27THz(the corresponding wavelength is 47.847μm)incident light,the light electric field along the Zdirection reaches its maximum and the grating coupling efficiency reached highest,when the grating parameters are taken as grating period P=10.5μm,dute cycle w= 5.755μm and grating layer thickness h=0.4μm

关 键 词：金属光栅 量子阱光电探测器 太赫兹 耦合效率 

分 类 号：TN15[电子电信—物理电子学]