Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Single and double ultrashort laser pulse scattering by spheroidal
  metallic nanoparticles   The theory of the ultrashort laser pulse scattered by metallic nanoparticles
in the region of surface plasmon resonances is developed in the framework of
kinetic approach. For the spheroidal particles, the dependence of the light
scattering cross-section on the shape of the particles, the carrier wave
frequency, a pulse duration, and other factors is studied. Additionally, an
interaction of small metallic particles with double ultrashort pulse is
considered. In this case, the energy scattered by the particles demonstrates
oscillating behavior when the time delay between pulses changes. Special
attention is paid to the contribution of the particle's surface when the
particle's size is close to the length of free electron path. The difference
between the kinetic approach and Mie theory for non-spherical particles has
been shown.

22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys