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Dynamics of electric field screening in a bulk GaAs modulator

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1993

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Heesel, Heinrich
Hunsche, Stefan
Mikkelsen, Hakon
Leo, Karl
Kurz, Heinrich

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Physical Review B. 1993, 47(23), pp. 16000-16003. Available under: doi: 10.1103/PhysRevB.47.16000

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The transient development of electric-field distributions in a biased GaAs film after low-density optical excitation is determined by measurements of Franz-Keldysh modulations with a time resolution of 100 fs. The experimental results are compared with theoretical calculations. The transient field is calculated with a drift-diffusion model. Our calculation of the dielectric function of GaAs includes the Coulomb coupling and the electric field. The resulting optical transmission changes are calculated with a transfer-matrix method. The theory predicts a modification of the Franz-Keldysh modulation due to the nonuniform field, in quantitative agreement with the experimental observations.

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ISO 690HEESEL, Heinrich, Stefan HUNSCHE, Hakon MIKKELSEN, Thomas DEKORSY, Karl LEO, Heinrich KURZ, 1993. Dynamics of electric field screening in a bulk GaAs modulator. In: Physical Review B. 1993, 47(23), pp. 16000-16003. Available under: doi: 10.1103/PhysRevB.47.16000
BibTex
@article{Heesel1993Dynam-5135,
  year={1993},
  doi={10.1103/PhysRevB.47.16000},
  title={Dynamics of electric field screening in a bulk GaAs modulator},
  number={23},
  volume={47},
  journal={Physical Review B},
  pages={16000--16003},
  author={Heesel, Heinrich and Hunsche, Stefan and Mikkelsen, Hakon and Dekorsy, Thomas and Leo, Karl and Kurz, Heinrich}
}
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