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Quantifying Remote Heating from Propagating Surface Plasmon Polaritons.

Charlotte I Evans1, Pavlo Zolotavin1, Alessandro Alabastri1

  • 1Department of Physics and Astronomy, ‡Department of Electrical and Computer Engineering, and §Department of Materials Science and NanoEngineering, Rice University , 6100 Main Street, Houston, Texas 77005, United States.

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|August 11, 2017
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Summary
This summary is machine-generated.

This study demonstrates electrical detection of heating via surface plasmon polaritons (SPPs) in nanodevices. Propagating SPPs enable remote optical energy coupling, significantly reducing heating compared to direct illumination.

Keywords:
Plasmonicsbolometric detectiongratingheatingnanowiresurface plasmon polariton (SPP)thermoplasmonics

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Area of Science:

  • Plasmonics
  • Nanophotonics
  • Electrical Engineering

Background:

  • Surface plasmon polaritons (SPPs) are collective electron oscillations at metal-dielectric interfaces.
  • Efficient coupling of light to SPPs is crucial for nanoscale optical applications.
  • Detecting localized heating in nanodevices is important for understanding energy dissipation.

Purpose of the Study:

  • To develop a method for electrically detecting heating induced by propagating SPPs.
  • To investigate remote optical energy coupling into nanoconstrictions using SPPs.
  • To compare heating efficiency via SPP propagation versus direct illumination.

Main Methods:

  • Fabrication of gold "bow tie" nanodevices with lithographically defined gratings.
  • Excitation of SPPs using a continuous wave laser beam coupled through gratings.
  • Electrical detection of heating via changes in device conductance.
  • Computational modeling to quantify thermal contributions.

Main Results:

  • Successfully detected electrical heating from SPP excitation.
  • SPP propagation enables remote optical energy coupling into a nanowire constriction.
  • SPP propagation is the dominant heating mechanism.
  • SPP coupling reduces inferred constriction temperature by a factor of 60 compared to direct illumination.

Conclusions:

  • The grating-based SPP excitation method allows for remote optical energy delivery to nanoconstrictions.
  • This approach offers a significant advantage over direct laser illumination for measurements like surface-enhanced Raman spectroscopy.
  • Electrical detection of SPP-induced heating provides a valuable diagnostic tool for nanophotonic devices.