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Proceedings Paper

Excitonic Optical Nonlinearities Induced By Virtual Absorption
Author(s): D. Hulin; M. Joffre; M. Combescot; A. Migus; A. Antonetti
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Paper Abstract

Below-gap excitation of semiconductors induces a blue shift of the absorption spectrum, known as the optical Stark effect. Using femtosecond pump and probe spectroscopy, we monitor the temporal behavior of the optical Stark shift and observe an apparent non-instantaneous response. However we show that the actual response of the material is ultrafast, only its observation is perturbed by the exciton coherence. We also investigate the dependence of the Stark shift upon the band-structure, leading to a light-induced exciton splitting.

Paper Details

Date Published: 22 December 1989
PDF: 7 pages
Proc. SPIE 1127, Nonlinear Optical Materials II, (22 December 1989); doi: 10.1117/12.961405
Show Author Affiliations
D. Hulin, ENSTA - Ecole Polytechnique (France)
Univ. Paris VII (France)
M. Joffre, ENSTA - Ecole Polytechnique (France)
Univ. Paris VII (France)
M. Combescot, Univ. Paris VII (France)
A. Migus, ENSTA - Ecole Polytechnique (France)
A. Antonetti, ENSTA - Ecole Polytechnique (France)

Published in SPIE Proceedings Vol. 1127:
Nonlinear Optical Materials II
Jean-Bernard Grun, Editor(s)

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