Surface-enhanced resonance Raman scattering in optical tweezers using co-axial second harmonic generation

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 whi...

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Veröffentlicht in:Optics express 2005-05, Vol.13 (11), p.4148-4153
Hauptverfasser: Jordan, Pamela, Cooper, Jon, McNay, Graeme, Docherty, Frances, Graham, Duncan, Smith, W, Sinclair, Gavin, Padgett, Miles
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container_end_page 4153
container_issue 11
container_start_page 4148
container_title Optics express
container_volume 13
creator Jordan, Pamela
Cooper, Jon
McNay, Graeme
Docherty, Frances
Graham, Duncan
Smith, W
Sinclair, Gavin
Padgett, Miles
description 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.
doi_str_mv 10.1364/OPEX.13.004148
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title Surface-enhanced resonance Raman scattering in optical tweezers using co-axial second harmonic generation
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