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Proceedings Paper

Excitonic Versus Thermal Contribution To All-Optical Switching In A Nonlinear Multiple Quantum Well Directional Coupler Fabricated In GaAs.
Author(s): M. Cada; B. P. Keyworth; J. M. Glinski; A. J. SpringThorpe; P. Mandeville
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Paper Abstract

In previous works we have demonstrated that the MQW-coupled directional coupler is a promising design for all-optical switching elements. Experimental analysis has revealed that an efficient intensity-dependent coupling can be achieved between the two waveguides for a sample length as short as 127 μm. However, due to the presence of two competing nonlinearities, namely excitonic and thermal, there is some concern over the nature of the switching. W e report here on results which support our claim that the dominant mechanism in this case, where we are operating at low powers near the heavy-hole resonance peak, is the faster excitonic nonlinearity.

Paper Details

Date Published: 8 March 1989
PDF: 3 pages
Proc. SPIE 1017, Nonlinear Optical Materials, (8 March 1989); doi: 10.1117/12.949989
Show Author Affiliations
M. Cada, Technical University of Nova Scotia (Canada)
B. P. Keyworth, Technical University of Nova Scotia (Canada)
J. M. Glinski, Bell-Northern Research Ltd. (Canada)
A. J. SpringThorpe, Bell-Northern Research Ltd. (Canada)
P. Mandeville, Bell-Northern Research Ltd. (Canada)

Published in SPIE Proceedings Vol. 1017:
Nonlinear Optical Materials
Gerald Roosen, Editor(s)

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