Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of topological insulator waveguides: polarization control and the
  enhancement of the magneto-electric effect   Topological insulators subject to a time-symmetry-breaking perturbation are
predicted to display a magneto-electric effect that causes the electric and
magnetic induction fields to mix at the material's surface. This effect induces
polarization rotations of between ~1-10 mrad per interface in incident
plane-polarized light normal to a multilayered structure. Here we show,
theoretically and numerically, that, using a waveguide geometry with a
topological insulator guide layer and dielectric cladding, it is possible to
achieve rotations of between ~100-1000 mrad and generate an elliptical
polarization with only a three-layered structure. Both the rotation angle and
ellipticity are dependent on the permittivity contrast of the guide and
cladding layers and the strength of the time-symmetry-breaking perturbation.
This geometry is beneficial, not only as a way to enhance the magneto-electric
effect, rendering it easier to observe, but also as a method for controlling
the polarization of light in the next generation of photonic devices.

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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph