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

K. Meissner, B. Fluegel, Rudolf Binder, Stephan W Koch, Galina Khitrova, N. Peygambarian

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Abstract

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
Volume59
Issue number3
DOIs
StatePublished - 1991

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nonlinearity
quantum wells
aluminum gallium arsenides
electron scattering
pumps
probes
causes
excitation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Comparison of optical nonlinearities of type II and type I quantum wells. / Meissner, K.; Fluegel, B.; Binder, Rudolf; Koch, Stephan W; Khitrova, Galina; Peygambarian, N.

In: Applied Physics Letters, Vol. 59, No. 3, 1991, p. 259-261.

Research output: Contribution to journalArticle

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