Affiliation:
1. Beijing Institute of Technology
2. University of Eastern Finland
Abstract
Dammann gratings (DGs) can generate a spot array in a particular arrangement. In recent years, DGs have been used in many fields such as laser beam splitting and optical coupling. Nanograting encoding technology can achieve a high signal-to-noise ratio and high-efficiency diffraction distribution; it also provides new design ideas for realizing the miniaturization and deviceization of DGs. In this work, we have comprehensively studied the DG based on an all-dielectric metasurface, which can produce a
5
×
5
diffraction spot array with a diffraction angle of
20
∘
×
20
∘
. In an operation waveband from 650 to 690 nm, the DG has superior performance with high efficiency
≥
60
%
; meanwhile, it achieves a relative low contrast ratio
≤
0.33
. Owing to high efficiency, wide waveband performance, and polarization insensitive property, the all-dielectric metasurface DG can provide possibilities for various application, including laser technology and optical information processing.
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering
Cited by
6 articles.
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