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Type: Artigo de periódico
Title: Resonant Excitonic Optical Stark Effect In Gase
Author: Hirlimann C.
Morhange J.F.
Kanehisa M.A.
Chevy A.
Cruz C.H.B.
Abstract: The time-resolved nonlinear transmission of bulk ε-GaSe has been studied in the femtosecond regime when resonantly exciting the material in the vicinity of the exciton at room temperature. Two regimes are evidenced. At early time delay, a blue shift of the exciton with no linewidth broadening can be related to optical Stark effect, while at longer time delay the usual exciton screening and band-gap renormalization due to real electronic transitions is observed. At resonance, a dependence of the Stark shift with the amplitude of the exciting field is obtained, as predicted by a simple "dressed- atom" model.
Rights: aberto
Identifier DOI: 10.1063/1.102046
Date Issue: 1989
Appears in Collections:Unicamp - Artigos e Outros Documentos

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