Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simulation of metallic nanostructures for emission of THz radiation
  using the lateral photo-Dember effect   A 2D simulation for the lateral photo-Dember effect is used to calculate the
THz emission of metallic nanostructures due to ultrafast diffusion of carriers
in order to realize a series of THz emitters.

6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an