Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-10-20
physica status solidi (c) 9, 407-410 (2012)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Proceedings of ISCS 2011; to appear in physics status solidi (c)
Scientific paper
10.1002/pssc.201100236
We report on recent progress in the acousto-electrical control of self-assembled quantum dot and quantum post using radio frequency surface acoustic waves (SAWs). We show that the occupancy state of these optically active nanostructures can be controlled via the SAW-induced dissociation of photogenerated excitons and the resulting sequential bipolar carrier injection which strongly favors the formation of neutral excitons for quantum posts in contrast to conventional quantum dots. We demonstrate high fidelity preparation of the neutral biexciton which makes this approach suitable for deterministic entangled photon pair generation. The SAW driven acoustic charge conveyance is found to be highly efficient within the wide quantum well surrounding the quantum posts. Finally we present the direct observation of acoustically triggered carrier injection into remotely positioned, individual quantum posts which is required for a low-jitter SAW-triggered single photon source.
Kim Hyochul
Knall Florian
Krenner Hubert. J.
Petroff Pierre M.
Reuter Dirk
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