Dynamic Stark effect in interacting electron-hole systems: Light-enhanced excitons

Phys. Rev. B 34, 7164 – Published 15 November 1986
C. Comte and G. Mahler


A model semiconductor driven by a strong classical monochromatic laser beam is investigated. The resulting energy spectrum is found to be renormalized as a function of laser intensity and frequency. The stationary state is controlled by contact with a phonon heat bath. This state can be described as a pinned Bose-condensed state, the order parameter of which considerably increases with the light intensity (‘‘light-enhanced excitons’’). The optical response with respect to a second weak light beam consists of a spectrum with amplifying, transparent, and absorbing sections. The so-called Coulomb enhancement is considerably modified.

DOI: http://dx.doi.org/10.1103/PhysRevB.34.7164

  • Received 1 May 1986
  • Published in the issue dated 15 November 1986

© 1986 The American Physical Society

Authors & Affiliations

C. Comte

  • Laboratoire de Spectroscopie et d’Optique du Corps Solide, 5 rue de l’Université F-67084 Strasbourg Cédex, France

G. Mahler

  • Institut für Theoretische Physik, Universitat Stuttgart, D-7000 Stuttgart 80 (Vaihingen), Germany

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