A metamaterial terahertz modulator based on complementary planar double-split-ring resonator  

作　　者：王昌辉 匡登峰 常胜江 林列 

机构地区：[1]Key Laboratory of Optical Information Science and Technology of the Education Ministry of China,Institute of Mod-ern Optics,Nankai University

出　　处：《Optoelectronics Letters》2013年第4期266-269,共4页光电子快报（英文版）

基　　金：the National High Technology Research and Development Program of China (No.2011AA010205);the National Natural Science Foundation of China (Nos.61171027, 10904076 and 11274186);the Natural Science Foundation of Tianjin of China (No.10JCZDJC152000);the Doctoral Fund of Ministry of Education of China (No.20090031110033)

摘　　要：A metamaterial based on complementary planar double-split-ring resonator (DSRR) structure is presented and demonstrated, which can optically tune the transmission of the terahertz (THz) wave. Unlike the traditional DSRR metamaterials, the DSRR discussed in this paper consists of two split rings connected by two bridges. Numerical simulations with the finite-difference time-domain (FDTD) method reveal that the transmission spectra of the original and the complementary metamaterials are both in good agreement with Babinet's principle. Then by increasing the carrier density of the intrinsic GaAs substrate, the magnetic response of the complementary special DSRR metamaterial can be weakened or even turned off. This metamaterial structure is promised to be a narrow-band THz modulator with response time of several nanoseconds.A metamaterial based on complementary planar double-split-ring resonator （DSRR） structure is presented and demonstrated, which can optically tune the transmission of the terahertz （THz） wave. Unlike the traditional DSRR metamaterials, the DSRR discussed in this paper consists of two split rings connected by two bridges. Numerical simulations with the finite-difference time-domain （FDTD） method reveal that the transmission spectra of the original and the complementary metamaterials are both in good agreement with Babinet＇s principle. Then by increasing the carrier density of the intrinsic GaAs substrate, the magnetic response of the complementary special DSRR metamaterial can be weakened or even turned off. This metamaterial structure is promised to be a narrow-band THz modulator with response time of several nanoseconds.

关 键 词：太赫兹 谐振器 开口环 调制器 材料 互补 平面 时域有限差分法 

分 类 号：TN761[电子电信—电路与系统]