Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Brillouin light scattering studies of planar metallic magnonic crystals   The application of Brillouin light scattering to the study of the spin-wave
spectrum of one- and two-dimensional planar magnonic crystals consisting of
arrays of interacting stripes, dots and antidots is reviewed. It is shown that
the discrete set of allowed frequencies of an isolated nanoelement becomes a
finite-width frequency band for an array of identical interacting elements. It
is possible to tune the permitted and forbidden frequency bands, modifying the
geometrical or the material magnetic parameters, as well as the external
magnetic field. From a technological point of view, the accurate fabrication of
planar magnonic crystals and a proper understanding of their magnetic
excitation spectrum in the GHz range is oriented to the design of filters and
waveguides for microwave communication systems.

30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas