Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strong transmission and reflection of edge modes in bounded photonic
  graphene   The propagation of linear and nonlinear edge modes in bounded photonic
honeycomb lattices formed by an array of rapidly varying helical waveguides is
studied. These edge modes are found to exhibit strong transmission (reflection)
around sharp corners when the dispersion relation is topologically nontrivial
(trivial), and can also remain stationary. An asymptotic theory is developed
that establishes the presence (absence) of edge states on all four sides,
including in particular armchair edge states, in the topologically nontrivial
(trivial) case. In the presence of topological protection, nonlinear edge
solitons can persist over very long distances.

11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an