Molecules in the mirror: how SERS backgrounds arise from the quantum method of images.
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Authors
Barnett, Stephen M
Harris, Nadine
Baumberg, Jeremy J
Abstract
The Raman coupling of light to molecular vibrations is strongly modified when they are placed near a plasmonic metal surface, with the appearance of a strong broad continuum background in addition to the normal surface-enhanced Raman scattering (SERS) peaks. Using a quantum method of images approach, we produce a simple but quantitative explanation of the inevitable presence of the background, due to the resistive damping of the image molecule. This model thus suggests new strategies for enhancing the SERS peak to background ratio.
Description
Keywords
Metals, Quantum Theory, Spectrum Analysis, Raman, Surface Properties
Journal Title
Phys Chem Chem Phys
Conference Name
Journal ISSN
1463-9076
1463-9084
1463-9084
Volume Title
Publisher
Royal Society of Chemistry (RSC)
Publisher DOI
Sponsorship
Engineering and Physical Sciences Research Council (EP/G060649/1)
Engineering and Physical Sciences Research Council (EP/K028510/1)
Engineering and Physical Sciences Research Council (EP/K028510/1)
This work was supported by UK EPSRC EP/C511786/1, EP/F011393, ERC 320503 LINASS, EU CUBIHOLES, 3M, the Royal Society and the Wolfson Foundation.