Figure 4: Superradiant pulse emission and excitation trapping.
From: Giant photon bunching, superradiant pulse emission and excitation trapping in quantum-dot nanolasers
Calculated time evolution of the cavity mean photon number after pulsed optical excitation for weak pumping (a) and time integrated output intensity versus pump-pulse area (b). Results including superradiant coupling of the emitters (solid lines) are compared to those for independent emitters (dashed lines). As indicated in b a stronger spontaneous-emission rate into non-lasing modes γnl decreases the threshold modification due to superradiant coupling but corroborates the robustness of the effect. The inset confirms the presence of the threshold-kink in the experiment despite a large β-factor as an indication of excitation trapping due to superradiant emitter coupling.
