Silica particles were partially coated with silver, and a suitable chromophore, such that they could be trapped within an optical tweezers system and simultaneously be excited to emit a surface-enhanced resonance Raman scattering (SERRS) spectrum. 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 configuration has clear applications in providing apparatus that can manipulate a particle whilst simultaneously obtaining surface sensitive sensory information.
|Number of pages||5|
|Publication status||Published - 30 May 2005|
- optical confinement and manipulation
- frequency conversion
- surface plasmons
Jordan, P., Cooper, J., McNay, G., Docherty, F. T., Graham, D., Smith, W. E., ... Padgett, M. J. (2005). Surface-enhanced resonance Raman scattering in optical tweezers using co-axial second harmonic generation. Optics Express, 13(11), 4148-4153.