cw and femtosecond optical nonlinearities of type-II quantum wells

G R Olbright, W S Fu, A Owyoung, J F Klem, R Binder, I GALBRAITH, S W KOCH

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25 Citations (Scopus)


Femtosecond time-resolved and quasi-cw measurements of optical nonlinearities of type-II GaAs/AlAs quantum wells are reported. A pronounced blueshift of the heavy-hole exciton is observed, which develops on a 100-ps time scale after resonant interband excitation. The experimental observations are analyzed using many-body theory, explaining exciton blueshift and dynamical evolution in terms of electron-hole Coulomb enhancement, hole-phase-space filling, and hole-plasma cooling.

Original languageEnglish
Pages (from-to)1358-1361
Number of pages4
JournalPhysical Review Letters
Issue number10
Publication statusPublished - 11 Mar 1991


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