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High-efficiency broadband polarization-independent superscatterer using conformal metasurfaces

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Abstract

Safe detection of an arbitrarily shaped platform is critical for survivability, rescue, or navigation safety in a remote region. Metasurfaces afford great potential due to their strong electromagnetic (EM) wave control. However, studies have mainly focused on the physics and design of metasurfaces on planar plates, which does not satisfy the current requirements of aerodynamics and aesthetics. Herein, we propose a sophisticated strategy to design a metasurface that can wrap over arbitrarily shaped objects with moderate curvature on which optical aberrations are commonly introduced. By designing each meta-atom on the basis of the required position and phase compensation, exact EM wavefronts are restored. For verification, several conformal metasurfaces were designed and numerically studied on metallic cylinders at the microwave spectrum. A proof-of-concept device is fabricated and is experimentally characterized. The results demonstrate the availability of the desirable dual-beam superscatterer with strong backscattering enhancement toward two directions, thus indicating that the distortions induced by an arbitrary platform can be efficiently corrected. Our method affords an efficient alternative for designing high-performance multifunctional optoelectronic devices equipped on a moderately curved platform.

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DOI:10.1364/prj.6.000782

基金项目:National Natural Science Foundation of China (NSFC)10.13039/501100001809 (61501499); National Defense Foundation of China (2201078); Key Program of Natural Science Foundation of Shaanxi Province10.13039/501100007128 (2017KJXX-24); China Scholarship Council (CSC)10.13039/501100004543 (20173059); Aviation Science Foundation of China (20161996009).

收稿日期:2018-03-28

录用日期:2018-05-30

网络出版日期:2018-06-07

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He-Xiu Xu:Air and Missile Defense College, Air Force Engineering University, Xi’an 710051, China
Shiwei Tang:Department of Physics, Faculty of Science, Ningbo University, Ningbo 315211, Chinae-mail: tangshiwei@nbu.edu.cn
Chen Sun:Air and Missile Defense College, Air Force Engineering University, Xi’an 710051, China
Lianlin Li:School of Electronic Engineering and Computer Sciences, Peking University, Beijing 100871, China
Haiwen Liu:School of Information Engineering, East China Jiaotong University, Nanchang 330013, China
Xinmi Yang:School of Electronics and Information Engineering, Soochow University, Suzhou 215006, China
Fang Yuan:Air and Missile Defense College, Air Force Engineering University, Xi’an 710051, China
Yunming Sun:Advanced Technique Department, Key Laboratory of Aeronautics Computing Technique, Xi’an 710175, China

联系人作者:He-Xiu Xu(hxxuellen@gmail.com)

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引用该论文

He-Xiu Xu, Shiwei Tang, Chen Sun, Lianlin Li, Haiwen Liu, Xinmi Yang, Fang Yuan, and Yunming Sun, "High-efficiency broadband polarization-independent superscatterer using conformal metasurfaces," Photonics Research 6(8), 782-788 (2018)

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