Enhancement of Valence Band Mixing in Individual InAs/GaAs Quantum Dots by Rapid Thermal Annealing
JAPANESE JOURNAL OF APPLIED PHYSICS(2013)
Abstract
We measure polarization resolved photoluminescence from excitonic complexes in tens of single InAs/GaAs quantum dots (QDs) over a wide range of energies in two samples: one as-grown, the other subjected to rapid thermal annealing (RTA). thing the linear polarization of the X+ emission as a probe of the valence band mixing (VBM), we find that RTA enhances QD VBM, attributed to the increase in QD height. We complement our measurements with 8-band k . p calculations, which suggest the increase in height on annealing is responsible for this enhancement. (C) 2013 The Japan Society of Applied Physics
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Key words
Semiconductor Quantum Dots,Quantum Dots
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