2019 CAP Congress / Congrès de l'ACP 2019

35 - Plasmon-Enhanced Stimulated Raman Spectroscopy with Low-Power CW Lasers

4 Jun 2019, 16:45

2m

SWH 9082 + AQ South-East Corner / coin sud-est (Simon Fraser University)

Poster (Non-Student) / Affiche (Non-étudiant(e)) Division of Atomic, Molecular and Optical Physics, Canada / Division de la physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC) DAMOPC Poster Session & Student Poster Competition Finals (26) | Session d'affiches DPAMPC et finales du concours d'affiches étudiantes (26)

Speaker

Dr Yashar Esfahani Monfared (Dalhousie University)

Description

We present a successful combination of stimulated Raman spectroscopy (SRS) and surface-enhanced Raman scattering (SERS) using low-power cw laser sources and gold/silica nano-particles with embedded reporter molecules. We demonstrate that cw surface-enhanced stimulated Raman spectroscopy (cwSESRS) can be used to detect a Raman signal in samples with pico-molar or low nano-molar concentrations via a nano-particle enhancement. We report the preparation method for samples and illustrate how Raman spectra generated from our experiment matches the conventional Raman spectra of these samples. We also investigate the effect of source power, polarization and sample concentration on the cwSESRS signal. The realization of cwSESRS with low-cost cw sources, and pump and Stokes powers as low as 34 mW and 440 mW, leads to opportunities for a wider range of Raman spectroscopy applications especially in clinical research.