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Optically Transparent Metasurface Absorber Based on Reconfigurable and Flexible Indium Tin Oxide Film.

Lei Chen1, Ying Ruan1, Si Si Luo1

  • 1College of Electronics and Information Engineering, Shanghai University of Electric Power, Shanghai 200090, China.

Micromachines
|December 1, 2020
PubMed
Summary

This study introduces a flexible, breathable, and transparent metasurface for ultra-wideband electromagnetic absorption and isolation. The novel design offers tunable performance for wearable electronic applications.

Keywords:
flexible metasurfaceindium tin oxide filmoptically transparent metasurfacereconfigurable metasurface

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Area of Science:

  • Materials Science
  • Electromagnetics
  • Nanotechnology

Background:

  • Metasurfaces offer unique electromagnetic properties.
  • Need for flexible, transparent, and reconfigurable electromagnetic devices for wearables.

Purpose of the Study:

  • To design and demonstrate a flexible, breathable, and optically transparent metasurface with ultra-wideband absorption and electromagnetic isolation.
  • To explore the mechanically-reconfigurable properties of a dual-layer metasurface design.

Main Methods:

  • Fabrication of a double-layer indium tin oxide (ITO) metasurface on a polyethylene terephthalate (PET) substrate with carved structures.
  • Characterization of electromagnetic absorption, reflection, and transmission from 2 to 18 GHz under dual-polarization incidence.
  • Investigation of mechanical reconfigurability by altering the relative positions of the two ITO layers.

Main Results:

  • Achieved ultra-wideband absorption and electromagnetic isolation from 2 to 18 GHz for both x- and y-polarization.
  • Demonstrated excellent flexibility, optical transparency, and air permeability.
  • Confirmed mechanically-reconfigurable properties with distinct changes in transmission and reflection coefficients based on layer arrangement.

Conclusions:

  • The developed metasurface is suitable for wearable electronic applications requiring electromagnetic absorption and isolation.
  • The dual-layer, reconfigurable design offers advanced functionality for dynamic electromagnetic management.
  • Experimental results validate the simulation, confirming the potential for practical implementation.