Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2012-02-08
New J. Phys. 14, 023037 (2012)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
20 pages, 10 figures
Scientific paper
10.1088/1367-2630/14/2/023037
We investigate the photoluminescence temperature dependence of individual InAs/InGaAlAs quantum dots emitting in the optical telecommunication bands. The high-density dots are grown on InP substrates and the selection of a smaller dot number is done by the processing of suitable nanometer sized mesas. Using ensembles of only a few dots inside such mesas, their temperature stability, inter-dot charge transfer, as well as, carrier capture and escape mechanisms out of the dots are investigated systematically. This includes the discussion of the dot ensemble and individual dots. Among the single-dot properties, we investigate the transition of emission lines from zero-phonon line to acoustic phonon sideband dominated line shape with temperature. Moreover, the presence of single recombination lines up to temperatures of around 150 K is demonstrated.
Akahane Kouichi
Hermannstädter Claus
Huh Jun Ho
Jahan Nahid A.
Sasaki Makoto
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