Wavefront shaping enhanced Raman scattering in a turbid medium

Opt Lett. 2016 Apr 15;41(8):1769-72. doi: 10.1364/OL.41.001769.

Abstract

Spontaneous Raman scattering is a powerful tool for chemical sensing and imaging but suffers from a weak signal. In this Letter, we present an application of adaptive optics to enhance the Raman scattering signal detected through a turbid, optically thick material. This technique utilizes recent advances in wavefront shaping techniques for focusing light through a turbid media and applies them to chemical detection to achieve a signal enhancement with little sacrifice to the overall simplicity of the experimental setup. With this technique, we demonstrate an enhancement in the Raman signal from titanium dioxide particles through a highly scattering material. This technique may pave the way to label-free tracking using the optical memory effect.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Scattering, Radiation*
  • Spectrum Analysis, Raman*