期刊
OPTICS EXPRESS
卷 30, 期 10, 页码 17321-17331出版社
Optica Publishing Group
DOI: 10.1364/OE.456655
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资金
- National Key Research and Development Program of China [2020YFA0211300, 2017YFA0303702]
- National Natural Science Foundation of China [11634005, 11974176, 11974177, 12174188, 61975078]
In this study, we demonstrate a microwave metasurface that achieves broadband, wide-angle, and polarization-independent diffuse reflection and undistorted transmission. By changing the arrangement of meta-atoms, the wavefront in reflection can be independently manipulated, enabling a camouflaged meta-dome structure.
Allowing microwaves to transmit through without changing the wavefront is one of the essential requirements of the dome structures of antenna arrays like radars. Here, we demonstrate a microwave metasurface as an array of two types of meta-atoms, which are the flip counterparts to each other. Due to the reciprocity and space-inversion symmetry, the wavefront in the transmission is unchanged by the metasurface in a broad spectrum; while at the same time, the wavefront in reflection can be manipulated independently by changing the arrangement of the meta-atoms. Specifically, a random-flip metasurface that produces diffuse reflection is realized, enabling a camouflaged meta-dome. The broadband, wide-angle, and polarization-independent diffuse reflection and undistorted transmission are numerically and experimentally verified. Our finding enables a unique meta-dome structure that has camouflage functionality. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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