Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimally Chiral Electromagnetic Fields: Helicity Density and
  Interaction of Structured Light with Nanoscale Matter   We propose the concept of helicity maximization applicable to structured
light and obtain a universal rela-tion for the maximum of helicity density at a
given field energy density. We further demonstrate that us-ing structured light
with maximized helicity density eliminates the need of the specific knowledge
of en-ergy and helicity densities in determining the chirality of a
nanoparticle. The helicity maximization con-cept generalizes the use of the
dissymmetry factor in chirality detection to any chiral structure light
il-luminating nanoparticles.

34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat