1. Negative refraction in twisted hyperbolic metasurfaces.
- Author
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Liu, Yi, Ouyang, Chunmei, Xu, Quan, Su, Xiaoqiang, Ma, Jiajun, Zhao, Jing, Li, Yanfeng, Tian, Zhen, Gu, Jianqiang, Liu, Liyuan, Han, Jiaguang, and Zhang, Weili
- Subjects
NEGATIVE refraction ,ELECTRICAL conductors ,POLARIZATION of electromagnetic waves ,MAXWELL equations ,REFRACTION (Optics) ,POLARITONS ,SUBMILLIMETER waves ,BEAM steering - Abstract
In particular, for the TM mode, the dispersion relation can be written as: HT ht Graph (2)where I k i SB 0 sb is the wave-vector in free space, and I k i SB x sb , I k i SB y sb are the I x i and I y i components of the wave-vector, respectively. In the case of 0° < I i < 45° and HT ht , the relative permittivity obtained from EMT shows good agreement with Eq. (7). When the rotation angle I i = 0° and HT ht , the effective permittivity only has diagonal terms, which successfully predict the effective medium properties. When I i = 90°, the dispersion relation Eq. (5) changes to: HT ht Graph (6) We can clearly see that when the structural unit rotates 90°, the IFC rotates 90° accordingly. [Extracted from the article]
- Published
- 2022
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