Publikation:

Generation mechanism for coherent LO phonons in surface-space-charge fields of III-V-compounds

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1992

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Pfeifer, Torsten
Kütt, Waldemar
Kurz, Heinrich

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Applied Physics A. 1992, 55, pp. 482-488. Available under: doi: 10.1007/BF00348337

Zusammenfassung

We report on details of coherent LO phonon generation in surface-space-charge regions of III-V-compounds by optical injection of free carriers with laser pulses of 50 fs duration at 2 eV. Both the dynamics of the transient surface field, as well as the coherent lattice vibration, are measured via electro-optic sampling techniques under different experimental conditions. The driving force for the coherent phonon vibration is the sudden depolarization of the crystal lattice due to ultrafast screening of the intrinsic electrical surface field by photoexcited free carriers.

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530 Physik

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ISO 690PFEIFER, Torsten, Thomas DEKORSY, Waldemar KÜTT, Heinrich KURZ, 1992. Generation mechanism for coherent LO phonons in surface-space-charge fields of III-V-compounds. In: Applied Physics A. 1992, 55, pp. 482-488. Available under: doi: 10.1007/BF00348337
BibTex
@article{Pfeifer1992Gener-8860,
  year={1992},
  doi={10.1007/BF00348337},
  title={Generation mechanism for coherent LO phonons in surface-space-charge fields of III-V-compounds},
  volume={55},
  journal={Applied Physics A},
  pages={482--488},
  author={Pfeifer, Torsten and Dekorsy, Thomas and Kütt, Waldemar and Kurz, Heinrich}
}
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