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HL: Fachverband Halbleiterphysik
HL 4: Quantum dots and wires: Optical properties I
HL 4.3: Vortrag
Montag, 12. März 2018, 10:00–10:15, EW 201
Determination of the two-photon interference visibility of remote quantum emitters: The influence of temporal correlations — •J. H. Weber, J. Kettler, H. Vural, S. L. Portalupi, M. Jetter, and P. Michler — IHFG, IQST Center and SCoPE, Universität Stuttgart
Two-photon interference (TPI) with photons from remote quantum emitters is of key importance for upscaling of photonic quantum information schemes. On this respect, the photon indistinguishability of the overall emission is the key property which is typically measured via photon correlation exploiting the Hong-Ou-Mandel effect. However, temporal dynamics in emitter brightness and blinking of the emission result in unexpected correlation statistics. Such temporal correlations are frequently observed in several solid state sources being then fundamental to understand their effect on the measured statistics. In this study, we perform TPI with two remote semiconductor quantum dots and fully reproduce the resulting Hong-Ou-Mandel measurement not only via a developed analytical approach but also via Monte Carlo simulation. We show how both blinking and dynamic changes in brightness affect the temporal correlation. As it is then possible to predict the outcome, we show how to securely extract the TPI contrast from a single measurement. Moreover, a novel setup scheme is shown, which allows for blinking- and brightness-independent extraction of the TPI contrast. Even though, this report is based on semiconductor quantum dots as single-photon emitter, all findings can be directly transferred to any kind of quantum emitter.