Invisible surfaces enabled by the coalescence of anti-reflection and wavefront controllability in ultrathin metasurfaces

Hongchen Chu, Haoyang Zhang, Yang Zhang, Ruwen Peng, Mu Wang, Yang Hao () and Yun Lai ()
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Hongchen Chu: Nanjing University
Haoyang Zhang: Queen Mary University of London
Yang Zhang: Nanjing University
Ruwen Peng: Nanjing University
Mu Wang: Nanjing University
Yang Hao: Queen Mary University of London
Yun Lai: Nanjing University

Nature Communications, 2021, vol. 12, issue 1, 1-7

Abstract: Abstract Reflection inherently occurs on the interfaces between different media. In order to perfectly manipulate waves on the interfaces, integration of antireflection function in metasurfaces is highly desired. In this work, we demonstrate an approach to realize exceptional metasurfaces that combine the two vital functionalities of antireflection and arbitrary phase manipulation in the deep subwavelength scale. Such ultrathin devices confer reflection-less transmission through impedance-mismatched interfaces with arbitrary wavefront shapes. Theoretically and experimentally, we demonstrate a three-layer antireflection metasurface that achieves an intriguing phenomenon: the simultaneous elimination of the reflection and refraction effects on a dielectric surface. Incident waves transmit straightly through the dielectric surface as if the surface turns invisible. We further demonstrate a wide variety of applications such as invisible curved surfaces, “cloaking” of dielectric objects, reflection-less negative refraction and flat axicons on dielectric-air interfaces, etc. The coalescence of antireflection and wavefront controllability in the deep subwavelength scale brings new opportunities for advanced interface optics with high efficiency and great flexibility.

Date: 2021
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DOI: 10.1038/s41467-021-24763-9

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