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Optically-programmable nonlinear photonic component for dielectric-loaded plasmonic circuitry.

Alexey V Krasavin1, Sukanya Randhawa, Jean-Sebastien Bouillard

  • 1Department of Physics, King’s College London, Strand, London, UK. alexey.krasavin@kcl.ac.uk

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Researchers developed a novel plasmonic component using a polymer ring resonator. This device shows a 3-fold transmission change with low optical power, enabling reconfigurable photonic circuits.

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Area of Science:

  • Optoelectronics
  • Materials Science
  • Nanophotonics

Background:

  • Integrated photonic circuits require efficient and tunable optical components.
  • Plasmonic devices offer unique light-matter interaction capabilities at the nanoscale.
  • Nonlinear optical materials are crucial for active control in photonic devices.

Purpose of the Study:

  • To demonstrate a compact, optically tunable plasmonic component.
  • To investigate the use of a nonlinear polymer in a surface plasmon polariton ring resonator.
  • To assess the performance of the device in terms of transmission change and control power.

Main Methods:

  • Experimental fabrication and characterization of a surface plasmon polariton ring resonator.
  • Numerical simulations to model the device's optical response.
  • Utilizing a polymer material with trans-cis isomerization for optical nonlinearity.

Main Results:

  • Achieved a compact and efficient optically tunable plasmonic component.
  • Observed a >3-fold change in transmission between high and low states.
  • Demonstrated device operation at milliwatt control powers (~100 W/cm² intensity).

Conclusions:

  • The developed plasmonic component is suitable for optically programmable and reconfigurable integrated photonic circuits.
  • The performance is currently limited by the switching speed of the nonlinear polymer material.
  • This work highlights the potential of nonlinear plasmonic devices for advanced optical functionalities.