Frequency Modulated Raman Spectroscopy

Silvio Greco, Simone Dal Zilio, Alpan Bek, Marco Lazzarino*, Denys Naumenko

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The coupling of plasmonic and mechanical properties at the nanoscale is of great potential for the development of next generation devices capable to detect weak forces, mass changes, minute displacements and temperature-induced effects. Both the transduction of mechanical motion to the scattered light fields in term of polarization or intensity modulation and plasmon-driven mechanical oscillations have already been demonstrated. Quasi static tunable hot spots have recently been designed and applied to surface-enhanced Raman spectroscopy (SERS). Here we fabricated a plasmomechanical device, with a plasmonic hot spot modulated at the oscillator eigenfrequency, and demonstrated that the nonlinear modulation of polarization-dependent SERS signal from a synthetic dye can be analyzed with lock-in techniques, thus, realizing frequency modulated Raman spectroscopy.

Original languageEnglish
Pages (from-to)312-317
Number of pages6
JournalACS Photonics
Volume5
Issue number2
DOIs
Publication statusPublished - 21 Feb 2018
Externally publishedYes

Keywords

  • frequency modulation
  • MEMS
  • Raman
  • SERS

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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