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Dynamic Reflection Phase and Polarization Control in Metasurfaces.

Junghyun Park1, Ju-Hyung Kang1, Soo Jin Kim1

  • 1Geballe Laboratory for Advanced Materials, Stanford University , Stanford, California 94305, United States.

Nano Letters
|December 13, 2016
PubMed
Summary
This summary is machine-generated.

We developed novel optical metasurfaces for electrical tuning of light's reflection phase and polarization. These active metasurfaces utilize tunable plasmonic antennas for advanced optical control.

Keywords:
Metasurfaceelectrical gatingphase controlpolarization control

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Optical metasurfaces offer precise light manipulation via subwavelength antenna arrays.
  • Active metasurfaces have enabled amplitude modulation, with growing interest in controlling other light properties.

Purpose of the Study:

  • To present novel metasurfaces for electrical tuning of reflection phase and polarization.
  • To explore dynamic control of light properties beyond amplitude modulation.

Main Methods:

  • Utilized actively controlled plasmonic antennas and coupled mode theory.
  • Embedded indium-tin-oxide in gap-plasmon resonator-antennas for tunable optical properties.
  • Controlled antenna resonant properties across under- to overcoupling regimes.

Main Results:

  • Demonstrated electrical tuning of reflection phase over a 180° range.
  • Achieved dynamic control of polarization properties via electrical tuning.

Conclusions:

  • The developed metasurfaces offer electrical tunability of reflection phase and polarization.
  • This work introduces new design strategies for active metasurfaces.
  • Potential applications include advanced displacement measurements and tunable waveplates.