Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analytical model of optical properties of a metal nanorod   It is well known that the optical properties of spherical metal particles can
be described with the Rayleigh approximation or rigorous Mie theory. But for
the small metallic nanorods, a theory well capturing the resonance and
scattering features is still absent. In this paper, an analytical model is
developed for the metallic nanorod, considering the non-uniformly distributed
conduction current and surface charges. With the circuit parameters deduced
from the kinetic and electromagnetic energy of the plasmonic system, a formula
which agrees well with the simulations has been suggested for the resonance
wavelength. Moreover, by introducing the radiative resistance to the circuit
theory, the dipole moment, extinction spectrum, and the near-field enhancement
of nanorod have been derived analytically and confirmed numerically. These
results are valuable for understanding the plasmonic resonance and provide a
guideline for designing the light scattering and absorption.

35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys