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HL: Fachverband Halbleiterphysik

HL 18: Quantum dots and wires I

HL 18.9: Vortrag

Montag, 16. März 2020, 17:45–18:00, POT 151

Exploring the Full Photon Statistics of Bimodal-Micropillar Lasers with a Two-Channel Photon-Number-Resolving Transition-Edge-Sensor — •Ching-Wen Shih¹, Marco Schmidt¹, Wenera Zent¹, Christian Schneider², Sven Höfling², Jörn Beyer³, and Stephan Reitzenstein¹ — ¹Institut für Festkörperphysik, Technische Universität Berlin, Berlin, Germany — ²Technische Physik, Universität Würzburg, Germany — ³Physikalisch-Technische Bundesanstalt, Berlin, Germany

Photon statistics is no doubt one of the key characteristics of photons in quantum light sources. In this regard, a transition-edge-sensor (TES) is an extremely sensitive calorimeter which can resolve the photon numbers and provide the full photon statistics in one shot. Besides, in the case of quantum-dot micropillar lasers, it has been found out that a slight structural asymmetry in the cross-section of micropillars can lift the degeneracy of two fundamental mode components with perpendicular polarizations. In this work, we report on the joint photon number distribution of both modes in such bimodal-micropillar lasers measured by a two-channel photon-number-resolving TES detector system. While both modes share the common quantum dot gain, photon distributions mixed of thermal and Poissonian characteristics were observed above the lasing threshold, indicating interesting mode switching and gain competition effects. We then further reveal the higher-order correlation functions g^(k)(0) with k≥2 and the cross-correlation functions of both modes as a further confirmation of their behaviors.