Chinese Optics Letters, 2019, 17 (9): 093101, Published Online: Jul. 24, 2019
A reflecting-type highly efficient terahertz cross-polarization converter based on metamaterials Download: 831次
310.5448 Polarization, other optical properties 310.6628 Subwavelength structures,nanostructures 310.6805 Theory and design 240.5445 Polarization-selective devices
Abstract
We propose and experimentally demonstrate a wideband linear polarization converter in a reflection mode operating from 2.4 to 4.2 THz with conversion efficiency of more than 80%. Our device can expand the applications to a higher frequency band. A numerical simulation is performed for this metamaterial converter, which shows a good agreement with experimental results. Importantly, a concise and intuitive calculating model is proposed for the Fabry–Pérot cavity. The theoretical results indicate that the underlying reason for the enhanced polarization conversion is the additional phase difference induced by the resonance of the meta-structure and multiple reflections within the Fabry–Pérot cavity.
Xiaoqing Luo, Zhiyong Tan, Chang Wang, Juncheng Cao. A reflecting-type highly efficient terahertz cross-polarization converter based on metamaterials[J]. Chinese Optics Letters, 2019, 17(9): 093101.