Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generation of perfect vortex and vector beams based on
  Pancharatnam-Berry phase elements   Perfect vortex beams are the orbital angular momentum (OAM)-carrying beams
with fixed annular intensities, which provide a better source of OAM than
traditional Laguerre- Gaussian beams. However, ordinary schemes to obtain the
perfect vortex beams are usually bulky and unstable. We demonstrate here a
novel generation scheme by designing planar Pancharatnam-Berry (PB) phase
elements to replace all the elements required. Different from the conventional
approaches based on reflective or refractive elements, PB phase elements can
dramatically reduce the occupying volume of system. Moreover, the PB phase
element scheme is easily developed to produce the perfect vector beams.
Therefore, our scheme may provide prominent vortex and vector sources for
integrated optical communication and micromanipulation systems.

8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat