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Electro-optically Tunable Multifunctional Metasurfaces.

Ghazaleh Kafaie Shirmanesh, Ruzan Sokhoyan, Pin Chieh Wu1

  • 1Department of Photonics, National Cheng Kung University, Tainan 70101, Taiwan.

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Summary
This summary is machine-generated.

We developed a reconfigurable metasurface, a chip-scale nanophotonics array, that electronically controls light. This programmable device offers diverse optical functions like beam steering and focusing without moving parts.

Keywords:
active metasurfacebeam steeringfocusing meta-mirrorindium tin oxidemultifunctionalwavefront engineering

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Area of Science:

  • Nanophotonics
  • Metasurface technology
  • Optical engineering

Background:

  • Controlling light flow at the nanoscale is a long-standing challenge in nanophotonics.
  • Metasurfaces, chip-scale arrays of subwavelength antennas, offer comprehensive control over light wavefronts.
  • Existing metasurfaces often lack reconfigurability or multifunctionality.

Purpose of the Study:

  • To demonstrate a reconfigurable, multifunctional metasurface for the telecommunication wavelength regime.
  • To showcase a compact, lightweight, electronically controlled device with no moving parts.
  • To enable programmable control over optical functions using a single metasurface prototype.

Main Methods:

  • Utilizing an array of identical metasurface elements with electro-optical control.
  • Modulating the phase of scattered light from each element.
  • Configuring subwavelength antenna elements for dynamic wavefront control.

Main Results:

  • Demonstrated a single prototype multifunctional programmable metasurface.
  • Achieved dynamic beam steering and reconfigurable light focusing.
  • Showcased the capability for diverse optical functions in the telecommunication wavelength regime.

Conclusions:

  • Reconfigurable metasurfaces with tunable optical antennas can perform arbitrary optical functions.
  • Programmable array-level control of phase, amplitude, and polarization is key.
  • This technology offers a pathway towards electronic-like programmability in optics.