High-efficiency beam manipulation combining geometric phase with anisotropic Huygens surface
| Autor: | Wenyu Zhao, Jie Song, Bingyi Liu, Huan Jiang, Yongyuan Jiang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Physics and Astronomy (miscellaneous) business.industry Transmitted light Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences Helicity Photonic metamaterial Optics Geometric phase 0103 physical sciences Optoelectronics 010306 general physics 0210 nano-technology business Anisotropy Ohmic contact Circular polarization |
| Zdroj: | Applied Physics Letters. 108:181102 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | Conventional geometric metasurfaces relying on space-variant metal antennas for beam manipulation suffer from strong Ohmic loss and incomplete polarization conversion. The efficiency is often limited to rather small values, especially when operating in transmission mode. Here, we tackle this challenge by deliberately constructing an equivalent sheet with anisotropic surface electric and magnetic polarizabilities using cross-shaped dielectric antennas. An incident circularly polarized light can be almost fully converted to a transmitted light of opposite helicity with an unprecedented efficiency up to 98%. Such a transmissive metasurface possessing the merits of high-efficiency, non-dispersion, and robust against variations can serve as an outstanding candidate for flat optics, such as anomalous refraction and beam focusing. |
| Databáze: | OpenAIRE |
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