期刊
NANOPHOTONICS
卷 8, 期 6, 页码 1079-1085出版社
WALTER DE GRUYTER GMBH
DOI: 10.1515/nanoph-2019-0085
关键词
Huygens metasurfaces; Bessel beams; Dammann gratings
资金
- National Natural Science Foundation of China [61775019, 51675049]
- Beijing Municipal Natural Science Foundation [4172057, 3172027]
- Beijing Nova Program [Z171100001117047]
- Fok Ying-Tong Education Foundation of China [161009]
Bessel beams have attracted considerable interest because of their unique non-diffractive, self-healing characteristics. Different approaches have been proposed to generate Bessel beams, such as using axicons, diffractive optical elements, composite holograms, or spatial light modulators. However, these approaches have suffered from limited numerical aperture, low efficiency, polarization-dependent properties, etc. Here, by utilizing dielectric Huygens metasurfaces as ultrathin, compact platforms by integrating the functionalities of Dammann gratings and axicons, we successfully demonstrate multiple Bessel beam generation with polarization-independent property. The number of two-dimensional arrays can be controlled flexibly, which can enhance information capacity with a total efficiency that can reach 66.36%. This method can have various applications, such as parallel laser fabrication, efficient optical tweezers, and optical communication.
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