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Thermoplasmonic Semitransparent Nanohole Electrodes.

Daniel Tordera1, Dan Zhao1, Anton V Volkov1

  • 1Laboratory of Organic Electronics, Linköping University , SE-601 74 Norrköping, Sweden.

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Summary

Ultrathin plasmonic nanohole arrays efficiently convert light to heat, outperforming nanodisks and metal films. These arrays also function as electrodes, enabling novel thermistor and thermoelectric devices powered by sunlight.

Keywords:
Thermoplasmonicsarrayselectrodesnanoholesthermistorthermoelectric

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Area of Science:

  • Nanophotonics
  • Plasmonics
  • Nanoscale heat transfer

Background:

  • Nonradiative decay of plasmons in metallic nanostructures enables nanoscale light-to-heat conversion.
  • Metal nanohole arrays were traditionally viewed as heat sinks, not efficient heaters.

Purpose of the Study:

  • To investigate ultrathin plasmonic nanohole arrays as efficient nanoscale heat sources under broadband illumination.
  • To explore the dual functionality of these nanohole arrays as both heat generators and electrodes.
  • To develop and demonstrate novel plasmonic devices utilizing these properties.

Main Methods:

  • Fabrication of ultrathin plasmonic nanohole arrays.
  • Characterization of thermoplasmonic heating under simulated sunlight.
  • Development of plasmonic thermistors and hybrid plasmonic ionic thermoelectric devices.
  • Combined optical and thermal simulations for quantitative analysis.

Main Results:

  • Plasmonic nanohole arrays demonstrate significantly higher temperatures than nanodisk arrays and nonstructured films.
  • Achieved temperature increases up to 7.5 K under simulated sunlight, surpassing previous plasmonic systems.
  • Successfully developed and demonstrated plasmonic thermistors and a hybrid plasmonic ionic thermoelectric device.
  • Experimental results quantitatively align with optical and thermal simulations.

Conclusions:

  • Ultrathin plasmonic nanohole arrays are highly efficient thermoplasmonic heaters, offering superior performance over traditional designs.
  • The dual role of nanohole arrays as heaters and electrodes opens new avenues for nanoscale energy conversion and sensing applications.
  • Demonstrated a novel hybrid plasmonic ionic thermoelectric device powered by solar energy.