Generation of Wavelength-independent Sub-wavelength Bessel Beams using Metasurfaces

Abstract

Bessel beams are of great interest due to their unique non-diffractive properties. Using a conical prism or an objective paired with an annular aperture are two typical approaches to generating zeroth order Bessel beams. However, the former approach has a limited numerical aperture (NA), and the latter suffers from low efficiency since most of the incident… (More)

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