基于石墨烯的THz量子阱探测器耦合效率的研究  

Research on Quantum Well Photodetectors of THz Based on Graphene

作　　者：王赛丽 侯凡博 陈家林 Wang Saili;Hou Fanbo;Chen Jialin(School of electronic information and electrical engineering,Anyang Institute of Technology,Anyang Henan,455000;Anyang power supply company of State Grid Henan Electric Power Company,Anyang Henan,455000)

机构地区：[1]安阳工学院电子信息与电气工程学院,河南安阳455000 [2]国网河南省电力公司安阳供电公司,河南安阳455000

出　　处：《电子测试》2020年第22期39-41,共3页Electronic Test

基　　金：安阳市重点实验室电力电子与电气传动。

摘　　要：本文研究了石墨烯的表面等离激元现象,并将其应用于THz光波的检测。通过FDTD算法分析了石墨烯表面对THz波的捕获情况,为了增强对光波吸收,在石墨烯表面引入金属光栅结构,并详细研究了金属光栅的参数对THz探测器耦合效率的影响。结果表明,采用6.27THz的光对THz量子阱探测器进行照射,可以得出对于6.27THz的入射光,当金属光栅周期P=10.3μm,金属层厚度h=0.4μm,金属块宽度W=5.15μm(占空比Z为0.5)时,耦合效率可以达到最大。This paper studies the surface plasmon of grapheme surface,it was used to detect THz wave.The trapping of THz wave on the surface of graphene has been analyzed by using the 3-D finite difference time domain(3D-FDTD),In order to enhance the absorption of light wave,the structure of the metal grating is introduced into the surface of grapheme,and the influence of the metal grating parameters on the coupling efficiency of THz detector is analyzed in detail.It can be concluded that for the incident light of 6.27THz,when the metal grating period P=10.3 m,the metal layer thickness h=0.4 m,the metal block width W=5.15 m(duty ratio is 0.5),the coupling efficiency of metal grating can reach the maximum,and the detection efficiency can be the highest.

关 键 词：石墨烯 表面等离激元 金属光栅 耦合效率 

分 类 号：TQ127.11[化学工程—无机化工] TN15[电子电信—物理电子学]