Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On circular Bragg regimes in ellipsometry spectra of ambichiral
  sculptured thin films   The generalized ellipsometry formalism is used for a right handed ambichiral
sculptured thin film.The amplitude ratios and phase differences of this
structure are extracted from the amplitude transmission ratios. The results
showed that the circular Bragg regimes appear with abruptly changes in
ellipsometry spectrum as wavelength, where the selective circular transmission
is maximized.

8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin