Efficient broadband energy detection from the visible to near-infrared using a plasmon FET

Seongman Cho, Mark A. Ciappesoni, Monica S. Allen, Jeffery W. Allen, Kevin D. Leedy, Brett R. Wenner, Sung Jin Kim

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Plasmon based field effect transistors (FETs) can be used to convert energy induced by incident optical radiation to electrical energy. Plasmonic FETs can efficiently detect incident light and amplify it by coupling to resonant plasmonic modes thus improving selectivity and signal to noise ratio. The spectral responses can be tailored both through optimization of nanostructure geometry as well as constitutive materials. In this paper, we studied various plasmonic nanostructures using gold for a wideband spectral response from visible to near-infrared. We show, using empirical data and simulation results, that detection loss exponentially increases as the volume of metal nanostructure increases and also a limited spectral response is possible using gold nanostructures in a plasmon to electric conversion device. Finally, we demonstrate a plasmon FET that offers a broadband spectral response from visible to telecommunication wavelengths.

Original languageEnglish (US)
Article number285201
Issue number28
StatePublished - May 10 2018


  • broadband photodetection
  • localized surface plasmon resonance
  • plasmon field effect transistor

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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