Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical Nano-antennas   This report is concerns with optical nano-antennas in their various forms
such as metallic nano-rods, cross-shaped nano-particles and apertures, periodic
meta-surfaces such hole arrays and bullseye structures. Their applications in
wavelength division multiplexing/demultiplexing, shaping the radiation pattern
and the state of polarization of the transmitted light, refractive index based
sensing, enhancement to the radiative decay rate of nearby quantum emitters and
novel approach in achieving such effects are presented.

18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph