Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Narrow-band single photon emission at room temperature based on a single
  Nitrogen-vacancy center coupled to an all-fiber-cavity   We report the realization of a device based on a single Nitrogen-vacancy (NV)
center in diamond coupled to a fiber-cavity for use as single photon source
(SPS). The device consists of two concave mirrors each directly fabricated on
the facets of two optical fibers and a preselected nanodiamond containing a
single NV center deposited onto one of these mirrors. Both, cavity in- and
output are directly fiber-coupled and the emission wavelength is easily tunable
by variation of the separation of the two mirrors with a piezo-electric
crystal. By coupling to the cavity we achieve an increase of the spectral
photon rate density by two orders of magnitude compared to free-space emission
of the NV center. With this work we establish a simple all-fiber based SPS with
promising prospects for the integration into photonic quantum networks.

16
The categories of this paper are: stat
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an