Publikation:

Coupled Bloch-Phonon Oscillations in Semiconductor Superlattices

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2000

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Kurz, Heinrich
Hey, Rudolf
Ploog, Klaus

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Physical Review Letters. 2000, 85(5), pp. 1080-1083. Available under: doi: 10.1103/PhysRevLett.85.1080

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We investigate coherent Bloch oscillations in GaAs/AlxGa1-xAs superlattices with electronic miniband widths larger than the optical phonon energy. In these superlattices the Bloch frequency can be tuned into resonance with the optical phonon. Close to resonance a direct coupling of Bloch oscillations to LO phonons is observed which gives rise to the coherent excitation of LO phonons. The density necessary for driving coherent LO phonons via Bloch oscillations is about 2 orders of magnitude smaller than the density necessary to drive coherent LO phonons in bulk GaAs. The experimental observations are confirmed by the theoretical description of this phenomenon.

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ISO 690DEKORSY, Thomas, Albrecht BARTELS, Heinrich KURZ, Klaus KÖHLER, Rudolf HEY, Klaus PLOOG, 2000. Coupled Bloch-Phonon Oscillations in Semiconductor Superlattices. In: Physical Review Letters. 2000, 85(5), pp. 1080-1083. Available under: doi: 10.1103/PhysRevLett.85.1080
BibTex
@article{Dekorsy2000Coupl-4812,
  year={2000},
  doi={10.1103/PhysRevLett.85.1080},
  title={Coupled Bloch-Phonon Oscillations in Semiconductor Superlattices},
  number={5},
  volume={85},
  journal={Physical Review Letters},
  pages={1080--1083},
  author={Dekorsy, Thomas and Bartels, Albrecht and Kurz, Heinrich and Köhler, Klaus and Hey, Rudolf and Ploog, Klaus}
}
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