Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coherent excitation-selective spectroscopy in planar metamaterials   In a proof-of-principle experiment with metamaterials exhibiting electric
dipolar and magnetic dipolar resonances, we demonstrated that the electric and
magnetic resonances can be separately switches off and on by positioning the
metamaterials along a standing wave, while both resonances are present in
travelling-wave spectra.

18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat