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

doi:10.1063/1.105614

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

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11 Scopus citations

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 language	English (US)
Pages (from-to)	259-261
Number of pages	3
Journal	Applied Physics Letters
Volume	59
Issue number	3
DOIs	https://doi.org/10.1063/1.105614
State	Published - 1991

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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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.",

author = "K. Meissner and B. Fluegel and R. Binder and Koch, {S. W.} and G. Khitrova and N. Peygambarian",

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T1 - Comparison of optical nonlinearities of type II and type I quantum wells

AU - Meissner, K.

AU - Fluegel, B.

AU - Binder, R.

AU - Koch, S. W.

AU - Khitrova, G.

AU - Peygambarian, N.

PY - 1991

Y1 - 1991

N2 - 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.

AB - 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.

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 3

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

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