Low Temperature Physics: 37, 197 (2011); https://doi.org/10.1063/1.3573604 (5 pages)
Acoustic conversion of quantum states in semiconductors
N.S. Averkiev1, I.V. Rozhansky1, S.A. Tarasenko1, and M.B. Lifshits1,2
1A.F. Ioffe Physical Technical Institute of the RAS, 26 Politekhnicheskaya, St. Petersburg 194021, Russia
2Universite Montpellier II, Montpellier, CEDEX 5, France
Received October 13, 2010
The interaction between solitary strain pulse (acoustic soliton) and localized holes in silicon-based nanostructures is studied theoretically. It is shown that the acoustic soliton propagating through the hole localization area changes the hole state to that with a different projection of angular momentum. The microscopic mechanism of the effect is related to the valence band splitting by local elastic strain. We have studied such a state conversion for holes in a quantum dot or localized at acceptors in a quantum well. It is shown that the strain amplitude required for the complete switching of the hole state corresponds to strain pulses studied experimentally.
PACS: 78.20.hb Piezo-optical, elasto-optical, acousto-optical, and photoelastic effects;
Key words: acoustic soliton, quantum dots, quantum wells.