Broadband SERS detection with disordered plasmonic hybrid aggregates

Peng Mao, Changxu Liu*, Qiang Chen*, Min Han, Stefan Maier*, Shuang Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

Plasmonic nanostructures possessing broadband intense field enhancement over a large area are highly desirable for nanophotonic and plasmonic device applications. In this study, 3D Ag hybrid nanoaggregates (3D-Ag-HNAs) are achieved via a highly efficient oblique angle gas-phase cluster beam deposition method. Not only can such structures produce a high density of plasmonic hot-spots to improve Raman sensitivity, but more importantly they generate kissing point-geometric singularities with a broadband optical response. We succeed in obtaining an experimental SERS enhancement factor beyond 4 × 107 in the visible range, providing an optimal sensing platform for different analytes. Combined with good uniformity, reproducibility and ease of fabrication, our 3D-Ag-HNA offers a candidate for new generations of SERS systems.

Original languageEnglish
Pages (from-to)93-102
Number of pages11
JournalNanoscale
Volume12
Issue number1
Early online date14 Oct 2019
DOIs
Publication statusPublished - 7 Jan 2020
Externally publishedYes

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