Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Soliton switching and Bloch-wave filtering in periodic photonic lattices   We suggest a novel concept in the soliton switching based on the Bloch-wave
filtering in periodic photonic structures. Taking a binary waveguide array as
an example, we demonstrate that spatial solitons that belong to different
spectral band gaps can be selectively reflected from or transmitted through an
engineered defect, which acts as a low or high-pass filter for Bloch waves.

20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
18
The categories of this paper are: econ
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol