Plasmon-induced hot electrons emission enhanced by Fabry–Perot cavity resonance on SOI

Zhiqiang Yang, Yang Pang, Heng Wang, Kang Du, Wending Zhang, Xuetao Gan, Soo Jin Chua, Ting Mei

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In this investigation, we report an Au/Si hot electron infrared detector fabricated on an SOI substrate. The simulation and experimental results show that Fabry–Perot cavity resonance on the SOI substrate and the surface plasmons excited by the Au nanostructures enhance the photo absorption in Au. Spectral response peaks of the hot electron photocurrent occur in the infrared band at a photon energy much smaller than the bandgap energy of Si. A maximum photocurrent was obtained at an annealing time of 90 s of the nanostructured Au film, and the SEM image showed the formation of a connected semi-island structure during the annealing. This hot electron device paves the way for extending infrared detection wavelength of SOI based detectors.

Original languageEnglish
Article number125930
JournalOptics Communications
Volume473
DOIs
StatePublished - 15 Oct 2020

Keywords

  • Fabry–Perot resonance
  • Hot electron
  • Silicon on insulator
  • Surface plasmon

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