Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 92: VCSELs, optical interconnects and Si photonics

HL 92.8: Vortrag

Donnerstag, 19. März 2015, 17:30–17:45, EW 202

Gain compression induced polarization mode competition in quantum-dot micropillar lasers:A comparison of theoretical modeling via multi-mode rate equations and experimental measurements — •Christoph Redlich, Benjamin Lingnau, and Kathy Lüdge — Institut f. Theo. Physik, Sekr. EW 7-1, Technische Universität Berlin, Hardenbergstr. 36, 10623Berlin, Germany

We present a comparison of experimental results and theoretical modeling of the two-mode light emission of quantum-dot semiconductor micropillar lasers (QD micropillar VCSEL) subjected to optical feedback from a distant mirror. Using stochastic multi-mode rate equations with phenomenological gain compression parameters and spontaneous emission noise we show very good agreement in terms of intensity profiles and stochastic properties of the examined QD lasers. We further investigate intensity correlation functions and correlation times which can nicely be described by the semi-classical rate equation system. Even effects like superthermal bunching are reproduced, showing that this effect also finds its origin in spontaneous emission noise induced mode switching.