Open AccessHybrid modes in plasmonic cavity array for enhanced hot-electron photodetection
Author(s) -
Zhiqiang Yang,
Min Liu,
Shuhai Liang,
Wending Zhang,
Ting Mei,
Dawei Zhang,
Soo Jin Chua
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.020268
Subject(s) - photodetection , plasmon , materials science , surface plasmon polariton , optics , optoelectronics , surface plasmon , photodetector , surface plasmon resonance , absorption (acoustics) , silicon , fano resonance , physics , nanotechnology , nanoparticle
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.