The role of Auger recombination in the temperature-dependent output characteristics (T=∞) of p-doped 1.3 μm quantum dot lasers

Temperature invariant output slope efficiency and threshold current $(T_0=\infty )$ in the temperature range of 5–75 °C have been measured for 1.3 μm $p$ -doped self-organized quantum dot lasers. Similar undoped quantum dot lasers exhibit $T_0=69\mathrm{K}$ in the same temperature range. A self-consistent model has been employed to calculate the various radiative and nonradiative current components in $p$ -doped and undoped lasers and to analyze the measured data. It is observed that Auger recombination in the dots plays an important role in determining the threshold current of the $p$ -doped lasers.