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Chimera metasurface for multiterrain invisibility.

Zhao-Hua Xu1, Su Xu1, Chao Qian2,3,4

  • 1State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.

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This study introduces a novel Chimera metasurface for advanced invisibility. This technology mimics natural camouflage across diverse terrains and frequencies, enabling adaptive cloaking for dynamic environments.

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adaptivechimerainvisibilitymultiterrainpoikilotherm

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Area of Science:

  • Metamaterials and Nanophotonics
  • Electromagnetics and Optics
  • Biomimetic Engineering

Background:

  • Current invisibility technologies are limited to stationary environments and narrow frequency bands.
  • Natural camouflage in poikilotherms (cold-blooded animals) offers inspiration for adaptive cloaking.
  • Optical transparency and thermal signature management are key challenges in achieving effective invisibility.

Purpose of the Study:

  • To experimentally demonstrate a reconfigurable metasurface for multi-terrain invisibility.
  • To achieve broadband, in situ tunable microwave reflection mimicry of various realistic environments.
  • To develop a mechanically-driven metasurface with thermal acclimation for reduced thermal detectability.

Main Methods:

  • Fabrication of a Chimera metasurface by synthesizing natural camouflage traits.
  • Utilizing circuit-topology-transited mode evolution for tunable microwave reflection (8-12 GHz).
  • Implementing a mechanic-driven system for thermal acclimation without active electrothermal effects.

Main Results:

  • The metasurface demonstrated chameleon-like, broadband microwave reflection mimicry of water, shoal, beach/desert, grassland, and frozen ground.
  • The metasurface remained optically transparent, similar to a glass frog.
  • The system achieved thermal acclimation, reducing the maximum thermal imaging difference to 3.1 °C, imperceptible to the human eye.

Conclusions:

  • The developed Chimera metasurface enables multi-terrain invisibility by adapting to diverse environments.
  • This work advances camouflage technology beyond constrained scenarios to dynamic terrains.
  • The findings represent a significant step towards next-generation reconfigurable electromagnetics with circuit-topology dynamics.