Abstract
We investigate many-body and nonequilibrium effects on the dynamical behavior of a quantum-dot laser diode. Simulations, based on the Maxwell-semiconductor-Bloch equations, show strong dependence of the turn-on delay on initial cavity detuning, because of a dynamical shift in the quantum-dot distribution caused by band gap renormalization. Gain switch behavior is found to be insensitive to inhomogeneous broadening, because the balancing between many-body and free-carrier effects inhibits a cavity resonance walk-off. Both the relaxation oscillation damping and frequency are found to increase with decreasing inhomogeneous broadening widths. However, in contrast to bulk and quantum-well lasers, oscillation damping increases less than the frequency. © 2010 American Institute of Physics.
| Original language | English |
|---|---|
| Journal | Applied Physics Letters |
| Volume | 97 |
| Issue number | 11 |
| DOIs | |
| State | Published - Sep 13 2010 |
| Externally published | Yes |
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