红外与毫米波学报2020，Vol.39Issue(4)：430-433,4.DOI:10.11972/j.issn.1001-9014.2020.04.006
光调制超材料及其传感应用
Photo-excited tunable metamaterial and its sensing application
摘要
Abstract
A terahertz photo-excited tunable metamaterial sensor is investigated. It is composed of a hybrid metal-semiconductor structure(which is a split ring resonator(SRR))and a flexible polyimide substrate. Silicon is filled in the gaps of the structure. Simulation results reveal that the conductivity of the semiconductor component can be tuned by changing the external pump light' s power,resulting in resonant peak shift of the composited metamaterial structure. The electric field and surface current density distributions of this structure under different resonant frequencies are also analyzed. The physical mechanism of this device has been further discussed. More?over,the resonant peak will be red-shift as the concentration of the surrounding environment(calcium chloride, CaCl2)increases,and the sensitivity is 11. 4 GHz/M,which makes it a possible application in liquid sensing in terahertz region.关键词
太赫兹/超材料/液体传感器Key words
terahertz/metamaterial/liquid sensor分类
通用工业技术引用本文复制引用
刘婧,沈京玲,张存林,赵跃进..光调制超材料及其传感应用[J].红外与毫米波学报,2020,39(4):430-433,4.基金项目
Supported by the Beijing Advanced Innovation Center for Imaging Theory and Technology(19530012003) （19530012003）
