6 February 2012 Molecular imaging with surface-enhanced CARS on nanostructures
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Proceedings Volume 8234, Plasmonics in Biology and Medicine IX; 82340E (2012) https://doi.org/10.1117/12.908272
Event: SPIE BiOS, 2012, San Francisco, California, United States
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.
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Christian Steuwe, Clemens F. Kaminski, Jeremy J. Baumberg, Sumeet Mahajan, "Molecular imaging with surface-enhanced CARS on nanostructures", Proc. SPIE 8234, Plasmonics in Biology and Medicine IX, 82340E (6 February 2012); doi: 10.1117/12.908272; https://doi.org/10.1117/12.908272
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