Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Compound surface-plasmon-polariton waves guided by a thin metal layer
  sandwiched between a homogeneous isotropic dielectric material and a
  structurally chiral material   Multiple compound surface plasmon-polariton (SPP) waves can be guided by a
structure consisting of a sufficiently thick layer of metal sandwiched between
a homogeneous isotropic dielectric (HID) material and a dielectric structurally
chiral material (SCM). The compound SPP waves are strongly bound to both
metal/dielectric interfaces when the thickness of the metal layer is comparable
to the skin depth but just to one of the two interfaces when the thickness is
much larger. The compound SPP waves differ in phase speed, attenuation rate,
and field profile, even though all are excitable at the same frequency. Some
compound SPP waves are not greatly affected by the choice of the direction of
propagation in the transverse plane but others are, depending on metal
thickness. For fixed metal thickness, the number of compound SPP waves depends
on the relative permittivity of the HID material, which can be useful for
sensing applications.

13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex