Surface-enhanced resonance Raman scattering in optical tweezers using co-axial second harmonic generation.
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.
Jordan
Pamela
P
Cooper
Jon
J
McNay
Graeme
G
Docherty
Frances
F
Graham
Duncan
D
Smith
W
W
Sinclair
Gavin
G
Padgett
Miles
M