Surface plasmon enhanced broadband spectrophotometry on black silver substrates

Zhida Xu, Yi Chen, Manas R. Gartia, Jing Jiang, Gang Logan Liu

Research output: Contribution to journalArticlepeer-review

Abstract

We demonstrate surface plasmon-induced enhancements in optical imaging and spectroscopy on silver coated silicon nanocones which we call black silver. The black silver with dense and homogeneous nanocone forest structure is fabricated with a mass-producible nanomanufacturing method. It can efficiently trap and convert incident photons into localized plasmons in broad wavelength range, permitting the enhancement in optical absorption from ultraviolet to near infrared range by 12 times, the visible fluorescence enhancement of ∼30 times and the Raman scattering enhancement factor up to ∼ 108. We show the potential of the black silver in high sensitivity and broadband optical sensing of molecules.

Original languageEnglish (US)
Article number241904
JournalApplied Physics Letters
Volume98
Issue number24
DOIs
StatePublished - Jun 13 2011

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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