Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Surface-enhanced Raman scattering and fluorescence near metal
  nanoparticles   We present a general model study of surface-enhanced resonant Raman
scattering and fluorescence, focusing on the interplay between electromagnetic
(EM) effects and the molecular dynamics as treated by a density matrix
calculation. The model molecule has two electronic levels, is affected by
radiative and non-radiative damping mechanisms, and a Franck-Condon mechanism
yields electron-vibration coupling. The coupling between the molecule and the
electromagnetic field is enhanced by placing it between two Ag nanoparticles.
The results show that the Raman scattering cross section can, for realistic
parameter values, increase by some 10 orders of magnitude (to $\sim10^{-14}$
cm$^2$) compared with the free-space case. Also the fluorescence cross section
grows with increasing EM enhancement, however, at a slower rate, and this
increase eventually stalls when non-radiative decay processes become important.
Finally, we find that anti-Stokes Raman scattering is possible with strong
incident laser intensities, $\sim 1$ mW/$\mu$m.

21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
16
The categories of this paper are: stat