Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Infrared Radiation from Rough Surface   We consider generation of diffusive radiation by a charged particle passing
through a random stack of plates in the infrared region. Diffusive radiation
originates due to multiple scattering of pseudophotons on the plates. To
enhance the radiation intensity one needs to make the scattering more
effective. For this goal we suggest to use materials with negative dielectric
constant .

30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas