Regensburg 2022 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 15: Delay and Feedback Dynamics
DY 15.2: Vortrag
Dienstag, 6. September 2022, 09:45–10:00, H19
The role of the polarization dephasing time for stabilizing coupled nanolasers — •Aycke Roos1, Stefan Meinecke1, and Kathy Lüdge2 — 1Technische Universität Berlin - Institut für Theoretische Physik, Hardenbergstraße 36, 10623 Berlin — 2Technische Universität Ilmenau - Institut für Physik, Fachgebiet Theoretische Physik 2, 98684 Ilmenau
As a prototypical model for on-chip laser networks, mutually coupled nanolasers attract attention in laser physics and dynamics. In the regime of small cavity lifetimes the carrier polarization essentially in- fluences the dynamics of such lasers. We investigate the emission dy- namics of two coupled lasers, modeled by Maxwell-Bloch type laser equations (class-C laser), and predict ways to optimize their stabil- ity, i.e., maximize their locking range. We find that tuning the cavity lifetime to the same order of magnitude as the dephasing time of the microscopic polarization yields optimal operation conditions, which allow for wider tuning ranges than usually observed in conventional semiconductor lasers. We present the steady state solutions and nu- merically characterize the emission dynamics via the underlying bi- furcation structure. The dephasing time is found to be a crucial pa- rameter, which impacts the observed dynamics in the parameter space spanned by frequency detuning, coupling strength and coupling phase.