Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The effect of shape anisotropy on the spectroscopic characterization of
  the magneto-optical activity of nanostructures   How to measure magnetic field induced magneto-optical (MO) activity of
nonmagnetic elliptical plasmonic nanodisks which rest on a dielectric substrate
remains a challenge since the substrate contribute most of the overall MO which
varies with light polarization with respect to the orientation of the
nanodisks. Here we present a spectroscopic characterization. We find that only
when light is incident from the nanostructures side with polarization aligned
with one of the two symmetry axes, one can subtract the MO contribution from
the substrate by an amount equal to that of a bare one. By a detailed
polarizing transmittance measurement we determine the orientation of the two
symmetry axes of the nanodisks. Light polarization is then aligned along the
axes, enabling measurement of the intrinsic MO activity of gold nanodisks,
which is the overall MO activity subtracted by that of a bare glass substrate.
The narrow line widths of the plasmonic resonance features in the MO spectra
imply a potential application in refractive index sensing.

13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: comp-gas