Applying high-power continuous-wave resonant s-shell excitation to a single self-assembled InGaAs quantum dot, we demonstrate the generation of postselected single-indistinguishable photons from the Mollow triplet sidebands. A sophisticated spatial filtering technique based on a double Michelson interferometer enabled us to separate the spectrally close lying individual Mollow components and perform almost background-free two-photon interference measurements. Showing high consistency with the results of an independent determination of the emission coherence of ∼250±30 ps, our analysis reveals a close to ideal visibility contrast of up to 97%. Due to their easy spectral tunability and their distinct advantage of cascaded-photon emission between the individual Mollow sidebands, they resemble a versatile tool for quantum information applications.
Publication: Postselected indistinguishable single-photon emission from the Mollow triplet sidebands of a resonantly excited quantum dot
S. Weiler, D. Stojanovic, S. M. Ulrich, M. Jetter and P. Michler 
Phys. Rev. B 87, 241302(R) (2013))
Contact person: Prof. Peter Michler