All-dielectric metaoptics for the compact generation of double-ring perfect vector beams

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 d...

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Bibliographic Details
Published in:Nanophotonics (Berlin, Germany) Germany), 2023-11, Vol.12 (22), p.4215-4228
Main Authors: Vogliardi, Andrea, Ruffato, Gianluca, Bonaldo, Daniele, Dal Zilio, Simone, Romanato, Filippo
Format: Article
Language:English
Subjects:
Atoms & subatomic particles
Cold atoms
double-ring perfect vortices
Fourier transforms
metasurfaces
Micromanipulation
Optical properties
Optics
orbital angular momentum
perfect vector beams
perfect vortices
Rings (mathematics)
Topology
vector beams
Vortices
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Summary: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.
ISSN:2192-8614
2192-8606
2192-8614
DOI:10.1515/nanoph-2023-0555