Polarization Management of Terahertz Extraordinary Optical Transmission through Ultracompact L-Shaped Subwavelength Patterns on Metal Films |
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Authors: | Lei Wang Haifeng Hu Kai Liu Suhua Jiang Wei Zeng Qiaoqiang Gan |
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Institution: | 1. Department of Materials Science, Fudan University, Shanghai, 200433, China 2. Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, NY, 14260, USA
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Abstract: | Compact and efficient terahertz (THz) polarization conversion components are of importance for applications where the small dimension of the laser device/system is critical. Here, we propose an ultracompact L-shaped subwavelength patterns on metal films to realize the THz polarization management. By optimizing the geometric parameters of single-layered and double-layered patterns, the linear-polarized THz incidence can be converted to elliptical polarized output or rotated by 90° efficiently due to the THz extraordinary optical transmission phenomenon. The physical mechanism is explored by mode analysis using numerical and analytical modeling. |
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