2 May 2014 Near-threshold relaxation dynamics of a quantum dot laser
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The near-threshold dynamics of a QD and a commercial QW laser are investigated both experimentally and theoretically. Below threshold, the resonance frequency and damping factor of the QD laser exhibit a different behaviour as compared to the QW counterpart. In the near-threshold regime, the intra-dot carrier relaxation is predicted from an empirical pairstates model to have a strong impact on the QD laser’s modulation dynamics. The widespread of experimental values for the damping factor reported in the literature for QD lasers is a further indication that this empirical approach is pushed to the limits in this situation. More accurate microscopic modelling should rely on a separation of electron and hole dynamics.
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Cheng Wang, Cheng Wang, Jacky Even, Jacky Even, Frédéric Grillot, Frédéric Grillot, "Near-threshold relaxation dynamics of a quantum dot laser", Proc. SPIE 9134, Semiconductor Lasers and Laser Dynamics VI, 913404 (2 May 2014); doi: 10.1117/12.2048996; https://doi.org/10.1117/12.2048996

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