Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 9: Quanteneffekte: Interferenz und Korrelationen

Q 9.2: Vortrag

Montag, 12. März 2012, 14:15–14:30, V7.01

Theory of coloured photon counting — •Elena del Valle1, Alejandro Gonzalez-Tudela2, Fabrice P. Laussy3, and Michael J. Hartmann11Technische Universität München, Germany — 2Universidad Autónoma de Madrid, Spain — 3Walter Schottky Institut, München, Germany

Experimentally, the study of correlations between peaks of photoluminescence spectra is common practice in cavity-QED systems [1]. This provides valuable information about the dynamics of the bare and dressed states (polaritons), especially in out-of-equilibrium systems [2], where polaritons may not be well defined and the spectra may become too complex. However an adequate theoretical description of this powerful experimental procedure is still lacking. Frequency resolved correlation functions are, indeed, difficult to obtain theoretically and have received very little attention up to now [3].

We develop a general theory of frequency and time resolved correlation functions valid for steady state situations under continuous excitation or for the decay dynamics after pulsed excitation. We apply our theory to different fundamental cases such as resonance fluorescence (Mollow triplet), coupled modes (Rabi doublet) or two-photon emission from a quantum dot in a microcavity [4] providing predictions and guidance for the experiments.

[1] Hennessy et al., Nature 445, 896 (2007). [2] Laussy et al., PRL 101, 083601 (2008); del Valle & Laussy. PRL 105, 233601 (2010). [3] Joosten & Nienhuis, J. Opt. B 2, 158 (2000); Bel & Brown, PRL 102, 018303 (2009). [4] del Valle et al., NJP 13, 113014 (2011).

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