Surface-Enhanced Raman Scattering in Purely Dielectric Structures via Bloch Surface Waves

We study surface-enhanced Raman scattering (SERS) in fully dielectric periodic structures supporting Bloch surface waves. We demonstrate a lower bound for the SERS enhancement of 50 when the optical pump is resonantly coupled to the Bloch surface wave supported by the structure. A corresponding phot...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2013-04, Vol.117 (13), p.6821-6825
Main Authors: Pirotta, S., Xu, X. G., Delfan, A., Mysore, S., Maiti, S., Dacarro, G., Patrini, M., Galli, M., Guizzetti, G., Bajoni, D., Sipe, J. E., Walker, G. C., Liscidini, M.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of specific thin films
Physics
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Summary:We study surface-enhanced Raman scattering (SERS) in fully dielectric periodic structures supporting Bloch surface waves. We demonstrate a lower bound for the SERS enhancement of 50 when the optical pump is resonantly coupled to the Bloch surface wave supported by the structure. A corresponding photoluminescence experiment shows an emission enhancement of more than two orders of magnitude, suggesting that the actual SERS enhancement is ∼200. Analogous conclusions are obtained by means of a semiclassical theoretical model. These results suggest an alternative to plasmonic materials to enhance Raman scattering at a surface and are of interest to those working in the field of Raman as well as fluorescence spectroscopy.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp400223f