Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhancement of the Raman Effect by Infrared Pumping   We propose a method for increasing the Raman scattering from an ensemble of
molecules by up to four orders of magnitude. Our method requires an additional
coherent source of IR radiation with the half-frequency of the Stokes shift.
This radiation excites the molecule electronic subsystem that in turn, via
Fr\"ohlich coupling, parametrically excites nuclear oscillations at a resonant
frequency. This motion is coherent and leads to a boost of the Raman signal in
comparison to the spontaneous signal because its intensity is proportional to
the squared number of molecules in the illuminated volume.

14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th