Excitonic optical Stark redshift: The biexciton signature

D. Hulin; M. Joffre

doi:10.1103/PhysRevLett.65.3425

Excitonic optical Stark redshift: The biexciton signature

D. Hulin and M. Joffre

Phys. Rev. Lett. 65, 3425 – Published 31 December 1990

Abstract

We report the observation of an exciton redshift with a below-gap laser beam, linked to the presence of a bound two-pair state in CuCl. This change in the shift direction for the optical Stark effect in semiconductors relies upon the predominant creation of virtual biexcitons, as shown by the polarization selection rules. Our experiment demonstrates the importance of the biexciton in the description of the optical Stark effect.

Received 21 May 1990

DOI:https://doi.org/10.1103/PhysRevLett.65.3425

Authors & Affiliations

D. Hulin and M. Joffre

Laboratoire d’Optique Appliquée, Ecole Nacionale Supérieure de Techniques Avancées, (ENSTA)(enEcole Polytechnique, Batterie de l’Yvette, 91120 Palaiseau, France
Groupe de Physique des Solides, Université Paris VII, 2 place Jussieu Paris 5, France