Abstract

In this work, inspired by advances in twisted two-dimensional materials, we design and study a new type of optical bi-layer metasurface system, which is based on subwavelength metal slit arrays with phase-gradient modulation, referred to as metagratings (MGs). It is shown that due to the found reversed diffraction law, the interlayer interaction that can be simply adjusted by the gap size can produce a transition from optical beam splitting to high-efficiency asymmetric transmission of incident light from two opposite directions. Our results provide new physics and some advantages for designing subwavelength optical devices to realize efficient wavefront manipulation and one-way propagation.

© 2021 Chinese Laser Press

Multi-functional high-efficiency light beam splitter based on metagrating

Yutian Xie, Jiaqi Quan, Qiangshi Shi, Yanyan Cao, Baoyin Sun, and Yadong Xu
Opt. Express 30(3) 4125-4132 (2022)

Efficient beam splitting using zero-load-impedance metagratings

Zhen Tan, Jianjia Yi, Vladislav Popov, and Shah Nawaz Burokur
Opt. Lett. 48(12) 3275-3278 (2023)

Mutual circular polarization conversions in asymmetric transmission and reflection modes by three-layer metasurface with gold split-rings

Zhe Shen and Quan He
Opt. Express 29(21) 34850-34862 (2021)

Dual and narrow-band optical filtering and sensing enabled by asymmetric dielectric metagratings

Aibibula Abudula, Abulizi Abulaiti, Melike Mohamedsedik, Feng Xu, and Paerhatijiang Tuersun
Opt. Mater. Express 14(2) 445-456 (2024)

All-optically controlled beam splitting through asymmetric polarization-based holography

Ziyao Lyu, Changshun Wang, Yujia Pan, Renjie Xia, Tianyu Chen, and Lili Sun
Opt. Lett. 44(8) 2129-2132 (2019)