Terahertz metasurface absorbed by both linearly and circularly polarized waves
Authors:
- 1 January 2023
- journal article
- research article
- Published by Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences in Acta Physica Sinica
- Vol. 72 (5) , 057802
Abstract
利用VO2嵌入超表面设计一种实现不同频率、线极化和圆极化两种模式入射下均产生高效率吸收的太赫兹超表面。当VO2为绝缘态时，设计的超表面对圆极化波的旋向产生选择性吸收，在1.30 THz处对左旋圆极化波(left-handed circularly polarized, LCP)产生的吸收率大于95%，对右旋圆极化波(right-handed circularly polarized , RCP)不吸收，圆二色性为0.85。当VO2为金属态时，在1.95 THz处，该超表面对TE线极化入射波吸收率达到98.5%。结果表明，在线极化和圆极化波入射下，所设计的超表面结构具有良好的广角吸收性能。由于它具有形态简单，易于加工等特点，在太赫兹波传感、成像和通信领域具有广阔应用前景。Keywords
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