Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Focusing of light beyond the diffraction limit   Diffraction limits the behaviour of light in optical systems and sets the
smallest achievable line width at half the wavelength. With a novel
subwavelength plasmonic lens to reduce the diffraction via an asymmetry and to
generate and squeeze the wave functions, an incident light is focused by the
aperture to a single-line with its width beyond the limit outside the near
zone. The fields focused are radiative and capable of propagating to the far
zone. The light focusing process, besides being of academic interest, is
expected to open up a wide range of application possibilities.

15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con