Chimera metasurface for multiterrain invisibility

• 成果类型: Article
• 署名作者: Xu, Zhao- Hua; Xu, Su; Qian, Chao; Xu, Wenya; Ren, Hang; Su, Wenming; Chen, Qi- Dai; Chen, Hongsheng; Sun, Hong - Bo
• 署名单位: Jilin University; Zhejiang University; Zhejiang University; Zhejiang University; Chinese Academy of Sciences; Suzhou Institute of Nano-Tech & Nano-Bionics, CAS; Tsinghua University
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-13990
• DOI: 10.1073/pnas.2309096120
• 发表日期: 2024-02-06
• 关键词: camouflage; thermoregulation; transparent; absorption; cloak

摘要

Invisibility, a fascinating ability of hiding objects within environments, has attracted broad interest for a long time. However, current invisibility technologies are still restricted to stationary environments and narrow band. Here, we experimentally demonstrate a Chimera metasurface for multiterrain invisibility by synthesizing the natural camouflage traits of various poikilotherms. The metasurface achieves chameleon - like broadband in situ tunable microwave reflection mimicry of realistic water surface, shoal, beach/desert, grassland, and frozen ground from 8 to 12 GHz freely via the circuit- topology- transited mode evolution, while remaining optically transparent as an invisible glass frog. Additionally, the mechanic- driven Chimera metasurface without active electrothermal effect, owning a bearded dragon - like thermal acclimation, can decrease the maximum thermal imaging difference to 3.1 degrees C in tested realistic terrains, which cannot be recognized by human eyes. Our work transitions camouflage technologies from the constrained scenario to ever- changing terrains and constitutes a big advance toward the new- generation reconfigurable electromagnetics with circuit- topology dynamics.