Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum-optical spectroscopy of a two-level system using an electrically
  driven micropillar laser as resonant excitation source   Two-level emitters constitute main building blocks of photonic quantum
systems and are model systems for the exploration of quantum optics in the
solid state. Most interesting is the strict-resonant excitation of such
emitters to generate close to ideal quantum light and to control their
occupation coherently. Up till now related experiments have been performed
exclusively using bulky lasers which hinders the application of resonantly
driven two-level emitters in photonic quantum systems. Here we perform
quantum-optical spectroscopy of a two-level system using a compact high-$\beta$
microlaser as excitation source. The two-level system is based on a
semiconductor quantum dot (QD), which is excited resonantly by a fiber-coupled
electrically driven micropillar laser. In this way we dress the excitonic state
of the QD under continuous wave excitation and trigger the emission of
single-photons with strong multi-photon suppression ($g^{(2)}(0)=0.02$) and
high photon indistinguishably ($V=57\pm9\%$) via pulsed resonant excitation at
156 MHz.

1
The categories of this paper are: cs
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int