Temperature-dependent measurement of Auger recombination in self-organized In[sub 0.4]Ga[sub 0.6]As/GaAs quantum dots

Ghosh, S.; Bhattacharya, P.; Stoner, E.; Singh, J.; Jiang, H.; Nuttinck, S.; Laskar, J.
August 2001
Applied Physics Letters;8/6/2001, Vol. 79 Issue 6
Academic Journal
We report experimental studies of temperature-dependent Auger recombination coefficients in self-assembled quantum dots. The results are based on a study of temperature-dependent large signal modulation experiments made on self-organized In[sub 0.4]Ga[sub 0.6]As/GaAs quantum dot lasers. The Auger coefficient decreases from ∼8×10[sup -29] cm[sup 6]/s at 100 K to ∼4×10[sup -29] cm[sup 6]/s at 300 K. This behavior, which is different from results in other higher-dimensional systems, is explained in terms of the temperature dependence of electron-hole scattering in the dots and contribution from higher lying states in the dot and adjoining layers. © 2001 American Institute of Physics.


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