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All-dielectric metaoptics for the compact generation of double-ring perfect vector beams
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DOI：10.1515/nanoph-2023-0555.png)
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Abstract
En 中文
Perfect vortices, whose ring profile is independent of the topological charge, play a key role in telecommunications and particle micro-manipulation. In this work, we report the compact generation of a new kind of double-ring perfect vortices, called double-ring perfect vector beams, by exploiting dual-functional silicon metaoptics. In particular, we develop and test a new paradigm to generate those beams with the possibility of selecting different topological charges between the two rings. The generated beams are characterized through a filtering method, proving that the two rings have a vectorial nature with the same magnitude and either the same or different topological charges. Their unique properties suggest promising applications for optical tweezing and manipulation of low refractive-index particles, trapping of cold atoms, and high-capacity communications.
Keywords:
metasurfaces
orbital angular momentum
vector beams
perfect vortices
perfect vector beams
double-ring perfect vortices
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