Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Discrete and surface solitons in photonic graphene nanoribbons   We analyze localization of light in honeycomb photonic lattices restricted in
one dimension which can be regarded as an optical analog of (``armchair'' and
``zigzag'') graphene nanoribbons. We find the conditions for the existence of
spatially localized states and discuss the effect of lattice topology on the
properties of discrete solitons excited inside the lattice and at its edges. In
particular, we discover a novel type of soliton bistability, the so-called
geometry-induced bistability, in the lattices of a finite extent.

14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess