Surface plasmon-induced absorption enhancement of silicon nanowire array

Eunsongyi Lee, Keya Zhou, Minji Gwon, Jin Young Jung, Jung Ho Lee, Dong Wook Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

We have investigated optical characteristics of silicon nanowire (Si NW) on Al disk arrays using the finite-difference time-domain (FDTD) simulations. Without the Al disk, the Si NW arrays alone exhibit strong absorption peaks, originated from guided mode resonance. The arrays of SiNW with Al disk possess additional broad peaks, at slightly larger wavelengths than those of the resonant guided mode peaks. The FDTD simulations show formation of concentrated electromagnetic field at the Si NW/Al interface, indicating excitation of localized surface plasmons. These results suggest that bottom-contact electrodes can work as means to enhance the optical absorption of the Si NWs as well as to collect carriers in Si NW-based optoelectronic devices.

Original languageEnglish
Title of host publicationPlasmonics
Subtitle of host publicationMetallic Nanostructures and Their Optical Properties X
DOIs
StatePublished - 2012
EventPlasmonics: Metallic Nanostructures and Their Optical Properties X - San Diego, CA, United States
Duration: 12 Aug 201216 Aug 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8457
ISSN (Print)0277-786X

Conference

ConferencePlasmonics: Metallic Nanostructures and Their Optical Properties X
Country/TerritoryUnited States
CitySan Diego, CA
Period12/08/1216/08/12

Keywords

  • Localized surface plasmon
  • Optical absorption
  • Silicon nanowire

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