Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Diffractive arrays of gold nanoparticles near an interface: critical
  role of the substrate   The optical properties of periodic arrays of plasmonic nanoantennas are
strongly affected by coherent multiple scattering in the plane of the array,
which leads to sharp spectral resonances in both transmission and reflection
when the wavelength is commensurate with the period. We demonstrate that the
presence of a substrate (i.e., an asymmetric refractive-index environment) can
inhibit long-range coupling between the particles and suppress lattice
resonances, in agreement with recent experimental results. We find the
substrate-to-superstrate index contrast and the distance between the array and
the interface to be critical parameters determining the strength of diffractive
coupling. Our rigorous electromagnetic simulations are well reproduced by a
simple analytical model. These findings are important in the design of periodic
structures and in the assessment of their optical resonances for potential use
in sensing and other photonic technologies.

21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg