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Title: Temperature-controlled chameleonlike cloak

Invisibility cloaking based on transformation optics has brought about unlimited space for reverie. However, the design and fabrication of transformation-optics-based cloaks still remain fairly challenging because of the complicated, even extreme, material prescriptions, including its meticulously engineered anisotropy, inhomogeneity and singularity. And almost all the state-of-the-art cloaking devices work within a narrow and invariable frequency band. Here, we propose a novel mechanism for all-dielectric temperature-controllable cloaks. A prototype device was designed and fabricated with SrTiO 3 ferroelectric cuboids as building blocks, and its cloaking effects were successfully demonstrated, including its frequency-agile invisibility by varying temperature. It revealed that the predesignated cloaking device based on our proposed strategy could be directly scaled in dimensions to operate at different frequency regions, without the necessity for further efforts of redesign. Finally, our work opens the door towards the realization of tunable cloaking devices for various practical applications and provides a simple strategy to readily extend the cloaking band from microwave to terahertz regimes without the need for reconfiguration.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [4]
  1. Tsinghua Univ., Beijing (China)
  2. Northwestern Polytechnical Univ., Xi’an (China)
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  4. Ames Lab. and Iowa State Univ., Ames, IA (United States); Institute of Electronic Structure and Lasers (IESL), Crete (Greece)
Publication Date:
Report Number(s):
IS-J-9312
Journal ID: ISSN 2160-3308; PRXHAE
Grant/Contract Number:
61275176; 51575297; 11372248; 61505164; 51532004; 51323006; NCET-13-0337; N00014-14-1-0474; 320081; JCYJ20160301154309393; GZKF-201509; AC02-07CH11358
Type:
Published Article
Journal Name:
Physical Review. X
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2160-3308
Publisher:
American Physical Society
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1349977
Alternate Identifier(s):
OSTI ID: 1357793