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Conferences > QELS > 1996 > QThG > QThG3
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1996),
  • paper QThG3

Coherent plasmon-phonon oscillations detected by the Franz-Keldysh effect

G. C. Cho, H. J. Bakker, T. Dekorsy, and H. Kurz

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Abstract

Coherent phonons are generated in the surface depletion layer of III-V semiconductors via the ultrafast screening of the surface field.1,2 In pump-probe experiments the modulation of the reflectivity resulting from coherent phonons can be detected by the intensity modulation of the weak probe pulses. For longitudinal oscillations like LO-phonon and plasmons the modification of the electronic susceptibility is dominated by the macroscopic electric field of these modes leading to an oscillation in the reflectivity.

© 1996 Optical Society of America

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