Dresden 2017 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 18: Semiconductor Lasers II
HL 18.5: Talk
Monday, March 20, 2017, 15:45–16:00, POT 06
Non-markovian delay in the formation of coherence in a pulsed quantum-dot crytal laser — •Mawussey Segnon1, Galan Moody2, Frank Jahnke1, Marty Stevens2 und Christopher Gies1 — 1Institute for Theoretical Physics, University of Bremen, P.O. Box 330 440, 28334 Bremen, Germany — 2Departement of Physics, University of Colorado and National Institute of Standards and Technology, Boulder, Colorado 80309-04440 USA
Photonic crystal (PC) cavities represent one way of tailoring the electromagnetic environment of an emitter and constitute an important structure for studying quantum electrodynamic phenomena. Within this work, we present results for time-resolved photon-correlation spectroscopy and its interpretation in terms of theory of InAsP/InP quantum dots (QDs) coupled to L3 cavity of a PC structure. The theoretical model, having its basis on a microscopic Hamiltonian of the QD and the quantum mechanical light field, allows us to access the output intensity and the second-order correlation function g(2)(t, τ = 0). When using pulsed excitation, the time evolution of the photon number crosses different regimes of thermal and coherent light, together making up the emitted pulse. We find systematic shifts between the time-resolved intensity pulse maximum and the coherence maximum revealed in g(2)(t, τ = 0). It is demonstrated that this stems from non-Markovian effects in the correlation dynamics. Our findings point out the possibility of using such devices as thermal light sources with unconventionally large output power.