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Phase-sensitive detection in Raman tweezers

Authors :
Giuseppe Pesce
A. De Luca
Giulia Rusciano
Antonio Sasso
Rusciano, Giulia
A. C., DE LUCA
Sasso, Antonio
AND G., Pesce
Source :
Applied Physics Letters. 89:261116
Publication Year :
2006
Publisher :
AIP Publishing, 2006.

Abstract

The authors discuss on a method to acquire the Raman spectrum of a single optically trapped particle. The method makes use of two laser beams: the first laser traps the particle and moves it back and forth in a plane perpendicular to the laser beam propagation; a second laser acts as Raman probe and it is fixed in space. The Raman spectrum is obtained by phase detecting the backscattered Raman photons using a lock-in amplifier. Within this approach, the background due to the scattering of the environment is completely removed. The authors apply this method to 4.25μm diameter polystyrene beads in aqueous solution.

Details

ISSN :
10773118 and 00036951
Volume :
89
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi.dedup.....24b11f7133ed4c28b0bf35f4566876ab
Full Text :
https://doi.org/10.1063/1.2424674