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Abstract: We experimentally and theoretically investigate dephasing of zero dimensionalmicrocavity polaritons in electrically tunable single dot photonic crystalnanocavities. Such devices allow us to alter the dot-cavity detuning in-situand to directly probe the influence on the emission spectrum of varying theincoherent excitation level and the lattice temperature. By comparing ourresults with theory we obtain the polariton dephasing rate and clarify itsdependence on optical excitation power and lattice temperature. For lowexcitation levels we observe a linear temperature dependence, indicative ofphonon mediated polariton dephasing. At higher excitation levels, excitationinduced dephasing is observed due to coupling to the solid-state environment.The results provide new information on coherence properties of quantum dotmicrocavity polaritons.



Autor: A. Laucht, N. Hauke, J. M. Villas-Bôas, F. Hofbauer, M. Kaniber, G. Böhm, J. J. Finley

Fuente: https://arxiv.org/







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