Abstract
The coupling characteristics and nonlinear all-optically controlled switching/modulation behavior is studied analytically and numerically for a GaAs/A1GaAs multiple quantum well (MQW) structure with self-defocusing nonlinearities. An exact dispersion equation is derived in terms of Jacobian elliptic functions for this MQW waveguiding structure. The optical-intensity dependent coupling length is treated as a combination of symmetrical-like and antisymmetrical-like modes of propagation. A single analytical formula is derived for the critical power of this structure. The new exact approach provides an insight into the very complicated nature of the structure.
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