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Motion of electron-hole drops in ge at low exciton densities

  • J. M. Hvam
Electron-hole Drops
  • 121 Downloads
Part of the Lecture Notes in Physics book series (LNP, volume 57)

Abstract

The expansion of the electron-hole drop (EHD) cloud after a short and local excitation by a pulsed dye laser is investigated by EHD detection in a metal-semiconductor contact. In regions with low free exciton (FE) densities a free flight of the drops is observed, suggesting a collision time of EHD τc ≥ 25μsec. It is proposed that the EHD are ejected out of the excitation region by a strong FE density gradient. Velocities in the range 200 – 2000 cm/s are observed independently of an applied electric field, indicating the EHD to be essentially uncharged.

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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • J. M. Hvam
    • 1
  1. 1.Institute of PhysicsOdense UniversityOdenseDenmark

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