Hybrid modes in plasmonic cavity array for enhanced hot-electron photodetection

Zhiqiang Yang, Min Liu, Shuhai Liang, Wending Zhang, Ting Mei, Dawei Zhang, Soo Jin Chua

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

The plasmonic characteristics of a periodic array of cavities in a silicon substrate are investigated for hot-electron photodetection. Resonances of cavity surface plasmons bound to air cavities and silicon cavities, and resonance of Bragg−surface plasmon polaritons are illustrated by the map of metal absorption. Hybrid modes formed with combination of these modes can strongly enhance absorption in metal and be exploited to optimize hot-electron photodetectors for single-band and dual-band detection at optical communication wavelengths.

Original languageEnglish
Pages (from-to)20268-20273
Number of pages6
JournalOptics Express
Volume25
Issue number17
DOIs
StatePublished - 21 Aug 2017

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