Open AccessUltra-broadband large-angle beam splitter based on a homogeneous metasurface at visible wavelengths
Author(s) -
Jing Li,
Han Ye,
Tong Wu,
Yumin Liu,
Zhongyuan Yu,
Yu Wang,
Yuhang Sun,
Li Yu
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.405375
Subject(s) - beam splitter , optics , broadband , fabrication , bandwidth (computing) , splitter , materials science , wavelength , optoelectronics , beam (structure) , physics , computer science , telecommunications , laser , medicine , alternative medicine , pathology
Metasurface-based beam splitters with high efficiency, large split angle, wide bandwidth and easy fabrication are highly desirable and still in pursuit. In this paper, we propose a heuristic scheme for designing an ultra-broadband high-efficiency power beam splitter based on a homogeneous metasurface. The conversion efficiency and total transmission intensity of the power splitter stays higher than 95% and 0.66 within the wavelength region from 604 nm to 738 nm, respectively. Particularly, the conversion efficiency can maintain greater than 99% in 58 nm bandwidth. The angle between two split beams can reach a maximum of 157.82° at the wavelength of 738 nm. In addition to simplified design and easy fabrication, the proposed power beam splitter possesses high robustness as well. We expect that our design can pave a new way for realizing high-performance metasurface-based beam splitters.