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Fluidically Switchable Metasurface for Wide Spectrum Absorption.

Saptarshi Ghosh1, Sungjoon Lim2

  • 1School of Electrical and Electronics Engineering, Chung-Ang University, Heukseok-Dong, Dongjak-Gu, 156-756, Republic of Korea.

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|July 7, 2018
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Summary
This summary is machine-generated.

This study introduces a novel active metasurface that uses liquid metal for switchable wide spectrum absorption. This fluidically-reconfigurable design offers multifunctional characteristics and polarization-insensitive performance for advanced applications.

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Area of Science:

  • Metamaterials and Nanophotonics
  • Electromagnetic Engineering
  • Microfluidics

Background:

  • Metasurfaces offer advanced electromagnetic properties compared to traditional materials.
  • Active metasurfaces enable multifunctional capabilities without re-fabrication.
  • Previous fluidically-reconfigured metasurfaces often lacked polarization insensitivity.

Purpose of the Study:

  • To present a fluidically-reconfigurable active metasurface for switchable wide spectrum absorption.
  • To demonstrate multifunctional characteristics and polarization-insensitive behavior.
  • To validate the design through simulation and experimental fabrication.

Main Methods:

  • Design and simulation of a metasurface using liquid-metal-encased dielectric substrates.
  • Precise control of liquid metal flow to switch absorption frequencies.
  • Analysis of surface current distributions and parametric variations.
  • Fabrication using laser etching and experimental validation.

Main Results:

  • Achieved switchable wide spectrum absorption between two frequency regimes.
  • Demonstrated polarization-insensitive absorption.
  • Validated the proposed design through experimental measurements.

Conclusions:

  • The fluidically-reconfigurable active metasurface offers a promising platform for multifunctional electromagnetic devices.
  • This work highlights the potential of microfluidic technology in realizing advanced reconfigurable metasurfaces.
  • The developed metasurface shows significant potential for diverse applications requiring tunable absorption.