Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Controlling plexcitonic strong coupling via multidimensional hotspot
  nanoengineering   Plexcitonic strong coupling has ushered in an era of room-temperature quantum
electrodynamics that is achievable at the nanoscale, with potential
applications ranging from high-precision single-molecule spectroscopy to
quantum technologies functional under ambient conditions. Realizing these
applications on an industrial scale requires scalable and mass-producible
plasmonic cavities that provide ease of access and control for quantum
emitters. Via a rational selection of substrates and the canonical gold bowtie
nanoantenna, we propose a novel design strategy for multidimensional
engineering of nanocavity antenna-mode hotspots, which facilitates their
elevation to the top of the nanobowtie gap and provides a field enhancement of
~500 fold (a 1.6-fold increase compared to a conventional nanobowtie-on-glass
cavity at the bottom of the nanobowtie gap). We discuss the formation mechanism
for such antenna modes using different material substrates from the perspective
of charge carrier motion, and analyze their sensitivity to the geometrical
parameters of the device. The advantages of these antenna modes, particularly
in view of their dominantly in-plane polarized near-fields, are further
elaborated in a spatiotemporal study of plexcitonic strong coupling involving
single emitters and layered ensembles thereof, which reveals ultrafast quantum
dynamics dependent on both the substrate and nanobowtie geometry, as well as
the potential for applications related to 2D materials whose excitonic dipoles
are typically oriented in-plane. The conceptual discovery of this
substrate-enabled antenna-mode nanoengineering could readily be extended to
tailor hotspots in other plasmonic platforms, and we anticipate that this work
could inspire a wide range of novel research directions from photoluminescence
spectroscopy and sensing to the design of quantum logic gates and systems for
long-range energy transfer.

22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs