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Nanoscale conducting oxide PlasMOStor.

Ho W Lee1, Georgia Papadakis, Stanley P Burgos

  • 1Thomas J. Watson Laboratories of Applied Physics, California Institute of Technology , Pasadena, California 91125, United States.

Nano Letters
|October 11, 2014
PubMed
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Researchers developed an ultracompact plasmon slot waveguide modulator using a transparent conducting oxide. This device achieves high modulation performance, paving the way for advanced integrated nanophotonic circuits.

Area of Science:

  • Photonics and Nanotechnology
  • Materials Science
  • Electrical Engineering

Background:

  • Plasmonic slot waveguides offer strong light confinement for miniaturized optical devices.
  • Transparent conducting oxides (TCOs) are promising materials for active photonic components due to their tunable electronic properties.

Purpose of the Study:

  • To experimentally demonstrate an ultracompact plasmon slot waveguide field-effect modulator (PlasMOStor).
  • To investigate the modulation performance and underlying physics of TCO-based plasmonic modulators.

Main Methods:

  • Fabrication of a plasmonic slot waveguide with a TCO active region.
  • Electrical modulation of the TCO's dielectric function via field-effect.
  • Characterization of modulation depth and waveguide loss.
Keywords:
Plasmonicsactive plasmonicsepsilon near-zero materialfield-effect modulationmodulatornanocircuitsplasmonic slot waveguidetransparent conducting oxide

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Main Results:

  • Demonstration of an ultracompact modulator with high dynamic range (2.71 dB/μm).
  • Achieved low waveguide loss (approximately 0.45 dB/μm).
  • Observed strong modulation strength attributed to surface plasmon resonance in the voltage-tuned TCO.

Conclusions:

  • The PlasMOStor represents a significant advancement in nanoscale modulator design.
  • The results offer valuable insights for developing future integrated nanophotonic circuits.
  • TCOs are effective materials for high-performance plasmonic modulators.