Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Semiconductor split-ring resonators for thermally tunable, terahertz
  metamaterials   As the variation of temperature alters the intrinsic carrier density in a
semiconductor, numerical simulations indicate that the consequent variation of
the relative permittivity in the terahertz regime provides a way to realize
thermally tunable split-ring resonators. Electromagnetic metasurfaces and
metamaterials that are thermally tunable in the terahertz regime can thus be
implemented.

1
The categories of this paper are: cs
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th