Journal article ยท Preprint article
Nanostructure design for surface-enhanced Raman spectroscopy - prospects and limits
Surface-enhanced Raman spectroscopy (SERS) allows single-molecule detection due to the strong field localization occurring at sharp bends or kinks of the metal-vacuum interface. An important question concerns the limits of the signal enhancement that can be achieved via a judicious design of the surface.
By using a specific example of a technologically realizable nanopatterned surface, we demonstrate that while very high enhancement factors (~10^12) can be found for an ideal surface, these are unlikely to be achieved in laboratory samples, because even a minute, inevitable rounding-off strongly suppresses the enhancement, as well as shifts the optimal frequency.
Our simulations indicate that the geometric enhancement factors are unlikely to exceed ~10^8 for real samples, and that it is necessary to consider the geometric uncertainty to reliably predict the frequency for maximum enhancement.
Language: | English |
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Publisher: | European Optical Society |
Year: | 2008 |
Pages: | 12 |
ISSN: | 19902573 |
Types: | Journal article and Preprint article |
DOI: | 10.2971/jeos.2008.08022 |
ORCIDs: | Xiao, Sanshui , Mortensen, Niels Asger and Jauho, Antti-Pekka |