Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 2D Plasmonics for Enabling Novel Light-Matter Interactions   The physics of light-matter interactions is strongly constrained by both the
small value of the fine-structure constant and the small size of the atom.
Overcoming these limitations is a long-standing challenge. Recent theoretical
and experimental breakthroughs have shown that two dimensional systems, such as
graphene, can support strongly confined light in the form of plasmons. These 2D
systems have a unique ability to squeeze the wavelength of light by over two
orders of magnitude. Such high confinement requires a revisitation of the main
assumptions of light-matter interactions. In this letter, we provide a general
theory of light-matter interactions in 2D systems which support plasmons. This
theory reveals that conventionally forbidden light-matter interactions, such
as: high-order multipolar transitions, two-plasmon spontaneous emission, and
spin-flip transitions can occur on very short time-scales - comparable to those
of conventionally fast transitions. Our findings enable new platforms for
spectroscopy, sensing, broadband light generation, and a potential test-ground
for non-perturbative quantum electrodynamics.

34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ