太赫兹科学与电子信息学报Issue(2)：158-161,170,5.DOI:10.11805/TKYDA201402.0158
各向异性超材料中太赫兹波的偏振转换
Polarization conversion of terahertz wave in anisotropic metamaterials
摘要
Abstract
Anisotropic metamaterials can be utilized to manipulate the polarization states of terahertz waves, and realize the polarization conversion. In order to obtain the dependence of transmission properties of achiral anisotropic metamaterials on the complex transmission coefficients of eigenmodes and incident polarization angles, transmission spectra of L-shaped metamaterials at different polarization angles are measured using terahertz time-domain spectroscopy. Consistent results are obtained through analytical calculation based on the Jones matrix and coordinate transformation. The polarization conversion rates and polarization states of transmitted terahertz waves are obtained and analyzed by the complex transmission coefficients of eigenmodes. A flat polarization conversion efficiency of about 20% is demonstrated in the frequency range 0.7 THz-1.3 THz. In addition, the cross-polarized transmission spectrum of L-shaped metamaterials is compared with that of double L-shaped metamaterials. Broadband and multiband responses are observed, respectively. The results can be used for design, characterization and optimization of various terahertz functional devices.关键词
各向异性超材料/太赫兹波/偏振转换/偏振态Key words
anisotropic metamaterials/terahertz wave/polarization conversion/polarization state分类
信息技术与安全科学引用本文复制引用
潘学聪,鄂轶文,汪力..各向异性超材料中太赫兹波的偏振转换[J].太赫兹科学与电子信息学报,2014,(2):158-161,170,5.基金项目
国家重点基础研究发展计划(973)资助项目(2014CB339800)；国家自然科学基金资助项目(No.61077082,11374358) （973）
