Berlin 2018 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 5: Semiconductor Lasers
HL 5.5: Vortrag
Montag, 12. März 2018, 10:30–10:45, EW 202
Switching behaviour of bimodal micro lasers with optical injection — •David Schicke1, Christoph Redlich1, Benjamin Lingnau1, Elisabeth Schlottmann2, Felix Krüger2, Xavier Porte2, Sören Kreinberg2, Kathy Lüdge1, and Stephan Reitzenstein2 — 1Institut für Theoretische Physik, Technische Universität Berlin — 2Institut für Festkörperphysik, Technische Universität Berlin
The dynamics of micropillar laser devices have been a topic of increased interest in the semiconductor laser community over the last years. Because of unavoidable structural asymmetries in such a micro laser, the device can emit in two possible orthogonal linearly polarized modes. Far from the threshold pump current, one of these modes becomes the dominant mode and suppresses the other, weak, mode. However, because of the high noise level present in the laser temporal switching is possible, i.e. the weaker mode becomes the strong, lasing, mode.
We present numerical simulations using a semiclassical rate equation approach to describe the emission dynamics of a bimodal laser subject to external optical injection and compare to recent experimental results. We find that the switching dynamics can be controlled by a proper choice of the injection parameters and investigate the underlying bifurcation scenarios by modeling the noise as a deterministic variable.