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- W3009968494 abstract "Abstract Chiral metasurfaces can achieve giant chiral optical responses and have been expanded from the optical band to other electromagnetic bands. Here, we propose a new method for dynamic terahertz circular dichroism (CD) manipulation in metasurfaces. By introducing a patterned and electrically doped graphene into the metamirror consists of double layer C-shaped split ring resonators (SRRs), efficient terahertz CD modulation is observed. Since the electrical doping of graphene changes the absorption loss of the metasuface cavity, the structure shows switching between a chiral metasurface and an ordinary metal mirror, which can be seen as and off states. The calculation results show an efficient modulation of the terahertz CD in a large dynamic range. In addition, we also use the new method to design two metasurfaces for dynamic terahertz wavefront modulation and near-field digital imaging, both of which show a high-performance electrical switching. This method provides a new way for the design of active terahertz devices based on metasurfaces, and also promotes the applications of terahertz chiral metasurfaces in high-speed wireless communication and dynamic imaging." @default.
- W3009968494 created "2020-03-13" @default.
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- W3009968494 date "2020-08-01" @default.
- W3009968494 modified "2023-10-16" @default.
- W3009968494 title "Metal-graphene hybrid active chiral metasurfaces for dynamic terahertz wavefront modulation and near field imaging" @default.
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- W3009968494 doi "https://doi.org/10.1016/j.carbon.2020.03.019" @default.
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