Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Momentum-resolved surface enhanced Raman scattering from a
  nanowire-nanoparticle junction cavity   Herein we report experimental evidence of directional SERS from molecules
situated inside a single nanowire-nanoparticle junction cavity. The emission
was confined to a narrow range of wavevectors perpendicular to the axis of the
cavity. In addition to this, the molecules excite multiple guided modes of the
nanowire which were imaged using leakage radiation Fourier microscopy. We
further characterize the emission wavevectors as a function of output
polarization. The excited guided modes of the wire show interesting
polarization signatures. All the results were corroborated using finite element
method based numerical simulations. Essentially, we provide an important
connection between gap-cavity enhanced Raman scattering and its directionality
of emission. The results may be of relevance in understanding the cavity
electrodynamics at the nanoscale and molecular coupling to extremely small gaps
between a one dimensional and a zero-dimensional plasmonic nanostructure.

14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas