Berlin 2018 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 33: Delay and Feedback Dynamics

DY 33.8: Talk

Tuesday, March 13, 2018, 15:45–16:00, BH-N 334

Dynamics of Quantum-Dot Based Micropillar Lasers with Optoelectronic Feedback — •Andrej Krimlowski, Benjamin Lingnau, and Kathy Lüdge — Institut für Theoretische Physik, Technische Universität Berlin

Semiconductor lasers with self-coupled delayed feedback show an extensive variety of physical phenomenons including nonlinear dynamics such as stabilized laser self-pulsing and chaos. We numerically investigate an on-chip optoelectronic feedback setup in a micropillar laser-detector assembly [1]. In this setup, the optical output signal of a micropillar laser is fed back into the laser pump current with an electronic delay. The system is characterized by strong spontaneous emission as well as a temperature dependent gain. The dependence of the system's dynamics on the temperature induces a time scale separation leading to complex dynamics. We perform a linear stability analysis and a numerical bifurcation analysis in dependence on system parameters as the feedback strength, the pump current and the maximum feedback current. We find a multitude of qualitatively different dynamics including complex states with periodic and non-periodic solutions and strong multistability of the system.