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Suppression of LO phonon scattering in Landau quantized quantum dots

Murdin, B. N., Hollingworth, A. R., Kamal-Saadi, M., Kotitschke, R. T., Ciesla, C. M., Pidgeon, C. R., Findlay, P. C., Pellemans, H. P. M., Langerak, C. J. G. M., Rowe, A. C., Stradling, R. A. and Gornik, E. (1999) Suppression of LO phonon scattering in Landau quantized quantum dots Physical Review B, 59 (12). ISSN 0163-1829


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Picosecond time-resolved far-infrared measurements are presented of the scattering between conduction-band states in a doped quasi quantum dot. These states are created by the application of a magnetic field along the growth direction of an InAs/AlSb quantum well. A clear suppression of the cooling rate is seen, from 1012 s-1 when the level spacing is equal to the phonon energy, to 1010 s-1 away from this resonance, and thus the results provide unambiguous evidence for the phonon bottleneck. Furthermore, the lifetimes had only weak dependence on temperature between 4 and 80 K.

Item Type: Article
Additional Information: Published in Physical Review B, 59, R7817 - R7820. © 1999 The American Physical Society.
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Photonics
Faculty of Engineering and Physical Sciences > Physics
Depositing User: Mr Adam Field
Date Deposited: 27 May 2010 14:44
Last Modified: 23 Sep 2013 18:34

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