Highly Efficient Bifunctional Dielectric Metasurfaces at Visible Wavelength: Beam Focusing and Anomalous Refraction in High-Order Modes
| Autor: | Yanqing Tian, Fei Wu, Zhenyu Xu, Yunbing Wei, Zhiwei Li |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Materials Science (miscellaneous) Biophysics General Physics and Astronomy highly-efficient Dielectric 01 natural sciences Electromagnetic radiation chemistry.chemical_compound 0103 physical sciences Miniaturization Physical and Theoretical Chemistry visible band 010306 general physics Bifunctional Mathematical Physics Nanopillar business.industry Refraction lcsh:QC1-999 bifunctional metasurface high-order chemistry Optoelectronics business lcsh:Physics Beam (structure) Visible spectrum |
| Zdroj: | Frontiers in Physics, Vol 8 (2020) |
| ISSN: | 2296-424X |
| DOI: | 10.3389/fphy.2020.575824 |
| Popis: | Metasurface is an artificially arranged sub-wavelength micro-structure array, where each structure can be regarded as a unit cell that is controlled by electromagnetic waves. Recently, bifunctional metasurfaces have garnered increasing interest and become excellent candidates for device miniaturization and integration. In this study, we propose a highly efficient bifunctional metasurface composed of silicon nanopillars, enabling beam anomalous refraction and focusing at visible wavelength. Based on the proposed metasurface, the other two metasurfaces demonstrating high-order beam anomalous refraction and focusing are designed successfully. This work will establish a positive prospect for the development of high-performance bifunctional metasurfaces. |
| Databáze: | OpenAIRE |
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