Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Single Defect Centers in Diamond Nanocrystals as Quantum Probes for
  Plasmonic Nanostructures   We present two applications of a single nitrogen vacancy center in a
nanodiamond as quantum probe for plasmonic nanostructures. Coupling to the
nanostructures is achieved in a highly controlled manner by picking up a
pre-characterized nanocrystal with an atomic force microscope and placing it at
the desired position. Local launching of single excitations into a nanowire
with a spatial control of few nanometers is demonstrated. Further, a two
dimensional map of the electromagnetic environment of a plasmonic bowtie
antenna was derived, resembling an ultimate limit of fluorescence lifetime
nanoscopy.

33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc