Comparison of optical nonlinearities of type II and type I quantum wells

K. Meissner, B. Fluegel, R. Binder, S. W. Koch, G. Khitrova, N. Peygambarian

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


We have performed low-temperature femtosecond pump and probe experiments on GaAs/AlAs type II and GaAs/AlGaAs type I multiple quantum wells of similar well sizes. The measurements are analyzed using a many-body theory appropriate for both types of systems. It is found that the type I and type II nonlinearities are very similar at early times after excitation. However, the very fast (<1 ps) Γ to X electron scattering in the type II samples causes pronounced differences at later times, allowing the observation of hole relaxation in the type II samples.

Original languageEnglish (US)
Pages (from-to)259-261
Number of pages3
JournalApplied Physics Letters
Issue number3
StatePublished - 1991

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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