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Proceedings Paper

Molecular imaging with surface-enhanced CARS on nanostructures
Author(s): Christian Steuwe; Clemens F. Kaminski; Jeremy J. Baumberg; Sumeet Mahajan
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Paper Abstract

Strongly localized electromagnetic fields in the vicinity of nanoparticles and nanogaps greatly enhance spectroscopic signals near them such as in surface-enhanced Raman spectroscopy (SERS). In this work we combine this plasmonic surface enhancement with coherent anti-Stokes Raman spectroscopy (CARS) on reproducible nanostructured surfaces. Surface-enhanced CARS (SECARS) gives rise to very strong enhancements and we find that an enhancement of ~105 can be obtained over standard CARS. Using our nanostructured surfaces, we demonstrate strong correlation between plasmon resonances and surface-enhanced CARS intensities. Furthermore, fast imaging of molecular monolayers is performed. Our work paves the way for reliable single molecule Raman spectroscopy and fast molecular imaging on plasmonic surfaces.

Paper Details

Date Published: 6 February 2012
PDF: 7 pages
Proc. SPIE 8234, Plasmonics in Biology and Medicine IX, 82340E (6 February 2012); doi: 10.1117/12.908272
Show Author Affiliations
Christian Steuwe, Univ. of Cambridge (United Kingdom)
Clemens F. Kaminski, Univ. of Cambridge (United Kingdom)
Jeremy J. Baumberg, Univ. of Cambridge (United Kingdom)
Sumeet Mahajan, Univ. of Cambridge (United Kingdom)

Published in SPIE Proceedings Vol. 8234:
Plasmonics in Biology and Medicine IX
Tuan Vo-Dinh; Joseph R. Lakowicz, Editor(s)

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