Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Picocavity-controlled Sub-nanometer Resolved Single Molecule Non-linear
  Fluorescence   In this article, we address fluorescence of single molecule inside a
plasmonic picocavity by proposing a semi-classical theory via combining the
macroscopic quantum electrodynamics theory and the open quantum system theory.
To gain insights into the experimental results [Nat. Photonics, 14, 693
(2020)], we have further equipped this theory with the classical
electromagnetic simulation of the pico-cavity, formed by single atom decorated
silver STM tip and a silver substrate, and the time-dependent density
functional theory calculation of zinc phthalocyanine molecule. Our simulations
not only reproduce the fluorescence spectrum as measured in the experiment,
confirming the influence of extreme field confinement afforded by the
picocavity, but also reveal Rabi oscillation dynamics and Mollow triplets
spectrum for moderate laser excitation. Thus, our study highlights the
possibility of coherently manipulating the molecular state and exploring
non-linear optical phenomena with the plasmonic picocavity.

37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ