Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-Dimensionally Confined Topological Edge States in Photonic Crystals   We present an all-dielectric photonic crystal structure that supports
two-dimensionally confined helical topological edge states. The topological
properties of the system are controlled by the crystal parameters. An interface
between two regions of differing band topologies gives rise to topological edge
states confined in a dielectric slab that propagate around sharp corners
without backscattering. Three dimensional finite-difference time-domain
calculations show these edges to be confined in the out-of-plane direction by
total internal reflection. Such nanoscale photonic crystal architectures could
enable strong interactions between photonic edge states and quantum emitters.

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The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn