Authors

A. Villeneuve; C. C. Yang; P. G. J. Wigley; G. I. Stegeman; J. S. Aitchison;C. N. Ironside

Comments

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"This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in the linked citation and may be found originally at Applied Physics Letters."

Abbreviated Journal Title

Appl. Phys. Lett.

Keywords

2-Photon Absorption; Limitation; Physics, Applied

Abstract

Efficient ultrafast all-optical switching in nonlinear directional couplers made of AlGaAs and AlGaAs/GaAs quantum wells near half the band gap is reported. The switching is limited by multiphoton absorption which is dominated by three-photon absorption in this spectral range. The three-photon absorption in the quantum well nonlinear directional coupler is stronger than that of bulk AlGaAs. Autocorrelations of the output pulses in the bar and cross states confirm pulse breakup through nonlinear coupling, and illustrate the effects of multiphoton absorption. All sets of experimental data are fitted well by a theoretical model.

Journal Title

Applied Physics Letters

Volume

61

Issue/Number

2

Publication Date

1-1-1992

Document Type

Article

Language

English

First Page

147

Last Page

149

WOS Identifier

WOS:A1992JD35200010

ISSN

0003-6951

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