Open AccessSurface-enhanced resonance Raman scattering in optical tweezers using co-axial second harmonic generation
Author(s) -
Pamela Jordan,
Jonathan M. Cooper,
Graeme McNay,
F. T. Docherty,
Duncan Graham,
Wayne Smith,
Gavin Sinclair,
Miles J. Padgett
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.004148
Subject(s) - optics , optical tweezers , materials science , raman scattering , resonance (particle physics) , second harmonic generation , raman spectroscopy , tweezers , chromophore , laser , scattering , optoelectronics , chemistry , physics , atomic physics , organic chemistry
Silica particles were partially coated with silver, and a suitable chromophore, such that they could be simultaneously trapped within an optical tweezers system, and emit a surface-enhanced resonance Raman scattering (SERRS) response. A standard 1064 nm TEM00 mode laser was used to trap the bead whilst a frequency doubling crystal inserted into the beam gave several microwatts of 532 nm co-linear light to excite the SERRS emission. The con fi guration has clear applications in providing apparatus that can simultaneously manipulate a particle whilst obtaining surface sensitive sensory information.