Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multifrequency broadband tapered plasmonic nanoantennas   We suggest a novel multifrequency broadband plasmonic Yagi-Uda-type
nanoantenna equipped with an array of tapered directors. Each director can be
used for the excitation of the antenna by nanoemitters matched spectrally with
the director resonant frequency and placed in the director near-field region.
Multifrequency op- eration of nanoantennas provides tremendous opportunities
for broadband emission enhancement, spectroscopy and sensing. By the principle
of reciprocity, the same tapered nanoantenna architecture can be used both as a
transmitter and/or as a receiver, thus being useful for creating a broadband
wireless communication system.

22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con