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