8 March 1989 Excitonic Versus Thermal Contribution To All-Optical Switching In A Nonlinear Multiple Quantum Well Directional Coupler Fabricated In GaAs.
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Proceedings Volume 1017, Nonlinear Optical Materials; (1989) https://doi.org/10.1117/12.949989
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany
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.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Cada, M. Cada, B. P. Keyworth, B. P. Keyworth, J. M. Glinski, J. M. Glinski, A. J. SpringThorpe, A. J. SpringThorpe, P. Mandeville, P. Mandeville, } "Excitonic Versus Thermal Contribution To All-Optical Switching In A Nonlinear Multiple Quantum Well Directional Coupler Fabricated In GaAs.", Proc. SPIE 1017, Nonlinear Optical Materials, (8 March 1989); doi: 10.1117/12.949989; https://doi.org/10.1117/12.949989
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