Work

Mirror-symmetry-protected metasurfaces enable ultra-broadband tailored transmission with invariant reflection

Year: 2024

Type: article

Abstract: In this work, we demonstrate a unique class of ultra-broadband mirror-symmetry-protected metasurfaces capable of achieving independent control over transmission and unaffected specular reflection. By leveraging mirror symmetry between two metaatoms, they are capable of generating out-of-phase transmission and in-phase reflection with different polarizations in an ultra-broad spectrum. This enables the flexible control of the transmission via designing the arrangement of the meta-atoms while, at the same time, retaining the same specular reflection regardless of the arrangement. Through microwave experiments, we have verified the functionalities of the mirror-symmetry-protected metasurfaces in a broad spectrum, such as beam splitting and diffusing in transmission, with undistorted specular reflection. This function, strictly protected by the mirror symmetry between the meta-atoms, is independent of detailed structure, material loss, and frequency. Extension to higher frequencies, like the infrared regime, has also been verified by simulations. Our work paves a road towards ultra-broadband metasurfaces, offering unprecedented broadband asymmetric control of electromagnetic waves.

Source: Optics Express

DOI: 10.1364/oe.540285

Authors: Xiaoxuan Ma, Hongchen Chu, Xiangteng Li, Yun Lai

Institution: Nanjing Normal University

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: National Natural Science Foundation of China, Natural Science Foundation of Jiangsu Province, National Key Research and Development Program of China