红外与毫米波学报2019，Vol.38Issue(1)：97-102,6.DOI:10.11972/j.issn.1001-9014.2019.01.016
光驱动宽频带可调谐太赫兹吸波器设计
Design of a photo-excited broadband tunable terahertz absorber
摘要
Abstract
A photo-excited and polarization insensitive broadband tunable terahertz metamaterial absorber ( MMA) based on the photo-sensitive material of silicon ( Si) is proposed. The unit-cell structure of this MMA is consisting of compact split-ring resonator structure filled with silicon, mediate medium layer and metal ground-plane. The working frequency and absorption intensity of this terahertz MMA could be effectively tuned, when the conductivity of silicon was changed by the varied incident optical intensity. The simulation results demonstrate that this MMA is dynamically adjusted in the frequency range from 0. 852 THz to 0. 442 THz when the conductivity of silicon increases from 1. 0 × 103 S/m to the 5. 0 × 105 S/m. In addition, its relative bandwidth is as much as 63. 37％ and absorption modulation depth is up to 60. 22％. The further simulation indicates that the MMA has characteristics of polarization insensitive and wide incident angle.关键词
光驱动/可调谐/太赫兹吸收器Key words
optical driving/tunable/terahertz absorber分类
通用工业技术引用本文复制引用
程用志,左轩,黄木林,王童年,龚荣洲..光驱动宽频带可调谐太赫兹吸波器设计[J].红外与毫米波学报,2019,38(1):97-102,6.基金项目
国家自然科学基金项目(U1435209,61605147) （U1435209,61605147）
湖北省自然科学基金项目(2017CFB588) （2017CFB588）
武汉科技大学研究生创新基金项目(JCX2016012) （JCX2016012）
大学生创新基金项目(17ZRB143) （17ZRB143）
