Title

Ultrafast All-Optical Switching In Semiconductor Nonlinear Directional-Couplers At Half The Band-Gap

Title - Alternative

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.

Publication 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

Share

COinS