Regensburg 2016 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 89: Quantum Dots and Wires: Lasing
HL 89.1: Vortrag
Donnerstag, 10. März 2016, 16:00–16:15, H13
Sub- and Superradiance in Quantum-Dot Nanolasers — •Heinrich A.M. Leymann1, Alexander Foerster1, Christopher Gies2, Marc Aßmann3, Christian Schneider4, Martin Kamp4, Sven Höfling4, Manfred Bayer3, Frank Jahnke2, and Jan Wiersig1 — 1Otto-von-Guericke-Universität Magdeburg Postfach 4120 39016 Magdeburg — 2Institut for Theoretical Physics University of Bremen P.O. Box 330 440 28334 Bremen, Germany — 3Experimentelle Physik 2 Technische Universität Dortmund Otto-Hahn-Straße 4 D-44227 Dortmund Germany — 4Technische Physik Am Hubland 97074 Würzburg
We investigate the influence of radiative coupling between emitters in quantum-dot (QD) nanolasers. For typical lasers with tens to hundreds of active QDs, a strong impact of sub- and superradiance (SR) on laser characteristics is demonstrated. It is shown that radiative coupling
enhances spontaneous emission such that significantly fewer emitters are required to reach the lasing threshold [1]. The SR coupling can seemingly change the β-factor by an order of
magnitude. Experimental results show a direct connection between superradiant pulse emission and distinctive changes in the photon correlation function which is in excellent agreement with the theoretical results. Calculations are based on a microscopic laser theory for the coupled
multi-QD-cavity-photon system [2].
Phys. Rev. Applied 4, 044018 (2015).
[2] Phys. Rev. B 89, 085308 (2014).