Generation of high-uniformity and high-resolution Bessel beam arrays through all-dielectric metasurfaces.

ABSTRACT: Bessel beam arrays are progressively attracting attention in recent years due to their remarkable non-diffracting nature and parallel manipulation capabilities in diverse applications. However, the poor phase discretization of conventional approaches such as spatial light modulators leads to low numerical aperture (NA) beam arrays due to the limitation imposed by the Nyquist sampling theorem and poor uniformity of the beam intensity. The key contribution of this study is to experimentally demonstrate the generation of high-uniformity and high-resolution Bessel beam arrays by utilizing all-dielectric metasurfaces. This is attained by optimizing the design of the supercell of a Dammann grating, particularly decreasing each supercell of the grating to a proper size. We demonstrate a 4 × 4 arr

SUBMITTER: Chen L 

PROVIDER: S-EPMC11501921 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature