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Title: Experimental Realization of an Extreme-Parameter Omnidirectional Cloak

Abstract

An ideal transformation-based omnidirectional cloak always relies on metamaterials with extreme parameters, which were previously thought to be too difficult to realize. For such a reason, in previous experimental proposals of invisibility cloaks, the extreme parameters requirements are usually abandoned, leading to inherent scattering. Here, we report on the first experimental demonstration of an omnidirectional cloak that satisfies the extreme parameters requirement, which can hide objects in a homogenous background. Instead of using resonant metamaterials that usually involve unavoidable absorptive loss, the extreme parameters are achieved using a nonresonant metamaterial comprising arrays of subwavelength metallic channels manufactured with 3D metal printing technology. A high level transmission of electromagnetic wave propagating through the present omnidirectional cloak, as well as significant reduction of scattering field, is demonstrated both numerically and experimentally. Our work may also inspire experimental realizations of the other full-parameter omnidirectional optical devices such as concentrator, rotators, and optical illusion apparatuses.

Authors:
 [1];  [2];  [1];  [1];  [3];  [1];  [4];  [5];  [6];  [1]
  1. Zhejiang Univ., Hangzhou (China). Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, State Key Lab. of Modern Optical Instrumentation and The Electromagnetics Academy
  2. Zhejiang Univ., Hangzhou (China). Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, State Key Lab. of Modern Optical Instrumentation and The Electromagnetics Academy; Ames Lab. and Iowa State Univ., Ames, IA (United States)
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  4. Zhejiang Univ., Hangzhou (China). Inst. of Marine Electronics Engineering
  5. Zhejiang Univ., Hangzhou (China). Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of Information Science and Electronic Engineering
  6. Ames Lab. and Iowa State Univ., Ames, IA (United States); Foundation for Research & Technology – Hellas (FORTH), Crete (Greece). Inst. of Electronic Structure and Laser
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1562682
Report Number(s):
IS-J-10036
Journal ID: ISSN 2639-5274
Grant/Contract Number:  
AC02-07CH11358; 320081
Resource Type:
Accepted Manuscript
Journal Name:
Research
Additional Journal Information:
Journal Volume: 2019; Journal ID: ISSN 2639-5274
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Zheng, Bin, Yang, Yihao, Shao, Zheping, Yan, Qinghui, Shen, Nian-Hai, Shen, Lian, Wang, Huaping, Li, Erping, Soukoulis, Costas M., and Chen, Hongsheng. Experimental Realization of an Extreme-Parameter Omnidirectional Cloak. United States: N. p., 2019. Web. doi:10.34133/2019/8282641.
Zheng, Bin, Yang, Yihao, Shao, Zheping, Yan, Qinghui, Shen, Nian-Hai, Shen, Lian, Wang, Huaping, Li, Erping, Soukoulis, Costas M., & Chen, Hongsheng. Experimental Realization of an Extreme-Parameter Omnidirectional Cloak. United States. doi:10.34133/2019/8282641.
Zheng, Bin, Yang, Yihao, Shao, Zheping, Yan, Qinghui, Shen, Nian-Hai, Shen, Lian, Wang, Huaping, Li, Erping, Soukoulis, Costas M., and Chen, Hongsheng. Sun . "Experimental Realization of an Extreme-Parameter Omnidirectional Cloak". United States. doi:10.34133/2019/8282641. https://www.osti.gov/servlets/purl/1562682.
@article{osti_1562682,
title = {Experimental Realization of an Extreme-Parameter Omnidirectional Cloak},
author = {Zheng, Bin and Yang, Yihao and Shao, Zheping and Yan, Qinghui and Shen, Nian-Hai and Shen, Lian and Wang, Huaping and Li, Erping and Soukoulis, Costas M. and Chen, Hongsheng},
abstractNote = {An ideal transformation-based omnidirectional cloak always relies on metamaterials with extreme parameters, which were previously thought to be too difficult to realize. For such a reason, in previous experimental proposals of invisibility cloaks, the extreme parameters requirements are usually abandoned, leading to inherent scattering. Here, we report on the first experimental demonstration of an omnidirectional cloak that satisfies the extreme parameters requirement, which can hide objects in a homogenous background. Instead of using resonant metamaterials that usually involve unavoidable absorptive loss, the extreme parameters are achieved using a nonresonant metamaterial comprising arrays of subwavelength metallic channels manufactured with 3D metal printing technology. A high level transmission of electromagnetic wave propagating through the present omnidirectional cloak, as well as significant reduction of scattering field, is demonstrated both numerically and experimentally. Our work may also inspire experimental realizations of the other full-parameter omnidirectional optical devices such as concentrator, rotators, and optical illusion apparatuses.},
doi = {10.34133/2019/8282641},
journal = {Research},
number = ,
volume = 2019,
place = {United States},
year = {2019},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: (a) Schematic view of the proposed omnidirectional cloak with extreme parameters. (b) Designing an omnidirectional cloak based on transformation optics. The space between the big square and the small one in virtual space is transformed into corresponding regions in physical space.These regions are divided into eight triangular segmentsmore » that can be grouped into two groups: Region Ⅰ (Ⅰ') and Region ⅠⅠ (ⅠⅠ'). The green lines represent trajectories of rays. The blue square is the hidden area.« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.