A reflecting-type highly efficient terahertz cross-polarization converter based on metamaterials

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2019,（9）
• 页码范围: 101-104
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201917.093101

摘要

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.