Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Morphological influence on surface--wave propagation at the planar
  interface of a metal film and a columnar thin film   The selection of a higher vapor deposition angle when growing a columnar thin
film (CTF) leads to surface-wave propagation at a planar metal-CTF interface
with phase velocity of lower magnitude and shorter propagation range.
Acordingly, a higher angle of plane-wave incidence is required to excite that
surface wave in a modified Kretschmann configuration.

8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph