Polarization-insensitive 3D conformal-skin metasurface cloak

He-Xiu Xu; Guangwei Hu; Yanzhao Wang; Chaohui Wang; Mingzhao Wang; Shaojie Wang; Yongjun Huang; Patrice Genevet; Wei Huang; Cheng-Wei Qiu

doi:10.1038/s41377-021-00507-8

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Polarization-insensitive 3D conformal-skin metasurface cloak

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- Polarization-insensitive 3D conformal-skin metasurface cloak
- Light: Science & Applications Vol. 10, Issue 5, Pages: 845-857(2021)
- Affiliations：
  
  1.Air and Missile Defense College, Air Force Engineering University, 710051 Xi'an, China
  2.Institute of Flexible Electronics, Northwestern Polytechnical University, 710072 Xi'an, China
  3.Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore
  4.School of Information and Communication Engineering, University of Electronic Science and Technology of China, 611731 Chengdu, China
  5.Université Côte d'Azur, CNRS, Centre de Recherche sur l'Hétéro-Epitaxie et ses Applications (CRHEA), 06560 Valbonne, France
- Author bio：
  
  He-Xiu Xu (hxxuellen@gmail.com)
  Patrice Genevet (pg@crhea.cnrs.fr)
  Wei Huang (iamwhuang@nwpu.edu.cn)
  Cheng-Wei Qiu (eleqc@nus.edu.sg)
- Funds：
- DOI：10.1038/s41377-021-00507-8
  CLC：
- Published：31 May 2021，
  
  Published Online：08 April 2021，
  
  Received：23 November 2020，
  
  Revised：09 February 2021，
  
  Accepted：04 March 2021
- Accepted：
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Xu, H. X. et al. Polarization-insensitive 3D conformal-skin metasurface cloak. Light: Science & Applications, 10, 845-857 (2021).
DOI：

Xu, H. X. et al. Polarization-insensitive 3D conformal-skin metasurface cloak. Light: Science & Applications, 10, 845-857 (2021). DOI： 10.1038/s41377-021-00507-8.

摘要

Abstract

Electromagnetic metasurface cloaks provide an alternative paradigm toward rendering arbitrarily shaped scatterers invisible. Most transformation-optics (TO) cloaks intrinsically need wavelength-scale volume/thickness

such that the incoming waves could have enough long paths to interact with structured meta-atoms in the cloak region and consequently restore the wavefront. Other challenges of TO cloaks include the polarization-dependent operation to avoid singular parameters of composite cloaking materials and limitations of canonical geometries

e.g.

circular

elliptical

trapezoidal

and triangular shapes. Here

we report for the first time a conformal-skin metasurface carpet cloak

enabling to work under arbitrary states of polarization (SOP) at Poincaré sphere for the incident light and arbitrary conformal platform of the object to be cloaked. By exploiting the foundry three-dimensional (3D) printing techniques to fabricate judiciously designed meta-atoms on the external surface of a conformal object

the spatial distributions of intensity and polarization of its scattered lights can be reconstructed exactly the same as if the scattering wavefront were deflected from a flat ground at any SOP

concealing targets under polarization-scanning detections. Two conformal-skin carpet cloaks working for partial- and full-azimuth plane operation are respectively fabricated on trapezoid and pyramid platforms via 3D printing. Experimental results are in good agreement with numerical simulations and both demonstrate the polarization-insensitive cloaking within a desirable bandwidth. Our approach paves a deterministic and robust step forward to the realization of interfacial

free-form

and full-polarization cloaking for a realistic arbitrary-shape target in real-world applications.

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references

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