Corrugated plasmonic cavity for enhanced intersubband photodetection

  • Chuanling Men
  • , Ri Qu
  • , Jun Cao
  • , Haochi Yu
  • , Peng Gou
  • , Yuexin Zou
  • , Le Yang
  • , Jie Qian
  • , Ziyi Zhao
  • , Jie Xu
  • , Zhenghua An*
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We study the optical properties of a corrugated plasmonic cavity consisting of a perforated metal film and a flat metal sheet separated by a semiconductor spacer. Corrugation enhances dramatically the coupling between the propagating surface plasmon and the Fabry-Perot mode and induces Rabi-like splitting forming bright bonding and dark anti-bonding modes. The anti-bonding mode exhibits considerably higher volume-averaged field enhancement factors (∼16.5 for E-field and ∼14.1 for Ez-component) than its bonding counterpart as well as a very high polarization conversion ratio (∼85.5%) from transverse electric to transverse magnetic waves. These characteristics make the corrugation induced anti-bonding mode particularly suitable for semiconductor quantum well intersubband photodetectors. Our work may provide a general guideline to the design of metamaterial-coupled intersubband hybrid devices for practical applications.

Original languageEnglish
Article number261103
JournalApplied Physics Letters
Volume110
Issue number26
DOIs
StatePublished - 26 Jun 2017
Externally publishedYes

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