Chang-hui Wang,Deng-feng Kuang,Sheng-jiang Chang,Lie Lin.A metamaterial terahertz modulator based on complementary planar double-split-ring resonator[J].Optoelectronics Letters,2013,9(4):266-269 A metamaterial terahertz modulator based on complementary planar double-split-ring resonator Author Name Affiliation E-mail Chang-hui Wang  Key Laboratory of Optical Information Science and Technology of the Education Ministry of China, Institute of Modern Optics, Nankai University, Tianjin, 300071, China    Deng-feng Kuang  Key Laboratory of Optical Information Science and Technology of the Education Ministry of China, Institute of Modern Optics, Nankai University, Tianjin, 300071, China    Sheng-jiang Chang  Key Laboratory of Optical Information Science and Technology of the Education Ministry of China, Institute of Modern Optics, Nankai University, Tianjin, 300071, China  sjchang@nankai.edu.cn  Lie Lin  Key Laboratory of Optical Information Science and Technology of the Education Ministry of China, Institute of Modern Optics, Nankai University, Tianjin, 300071, China    Abstract:       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. Hits: 4017 Download times: 82 View Full Text    Download reader