Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Connection Between Plasmon Decay Dynamics and the SERS background:
  Inelastic Scattering from Non-Thermal and Hot Carriers   Recent studies have established that the anti-Stokes Raman signal from
plasmonic metal nanostructures can be used to determine the two separate
temperatures that characterize carriers inside the metal -- the temperature of
photoexcited "hot carriers" and carriers that are thermalized with the metal
lattice. However, the related signal in the Stokes spectral region has
historically impeded surface enhanced Raman spectroscopy (SERS), as the
vibrational peaks of adsorbed molecules are always accompanied by the broad
background of the metal substrate. The fundamental source of the metal signal,
and hence its contribution to the spectrum, has been unclear. Here, we outline
a unified theoretical model that describes both the temperature-dependent
behavior and the broad spectral distribution. We suggest that the majority of
the Raman signal is from inelastic scattering directly with non-thermal
carriers that have been excited via damping of the surface plasmon. In
addition, a significant spectral component (~ 1%) is due to a sub-population of
hot carriers in an elevated thermal distribution. We have performed temperature
and power-dependent Raman experiments to show how a simple fitting procedure
reveals the plasmon dephasing time, as well as the temperatures of the hot
carriers and the metal lattice, in order to correlate these parameters with
quantitative Raman analysis of chemical species adsorbed on metal surface.

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The categories of this paper are: atom-ph
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
2
The categories of this paper are: math
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The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: eess