Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unidirectional light transmission by two-layer nanostructures
  interacting via optical near-fields   We experimentally demonstrate unidirectional light transmission through
two-layer nanostructured materials considering that the
horizontal-to-vertical-polarization conversion efficiency in the forward
direction and the vertical-to-horizontal efficiency in the backward direction,
which are usually equivalent due to optical reciprocity, are different. The
different ways of transferring light momentum in the forward and backward
directions via optical near-fields between the layers are responsible for the
unidirectionality of light, which was theoretically investigated in our recent
work [J. Opt. Soc. Am. B 31, 2404-2413]. With two-layer metal nanostructures
experimentally fabricated via a repeated lift-off technique, consistent optical
characteristics are observed, verifying the utilization of the large momentum
of optical near-fields.

15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con