Intersubband nonlinear optical susceptibility and electro-optical coefficients in asymmetric Bragg-confined coupled quantum wells

The optimization of Bragg-confined double quantum wells with respect to res onant second harmonic generation and electro-optic coefficients is consider ed. The method of optimization relies on solving a system of nonlinear equa tions which involve the geometric parameters of the structure and bound sta te energies. Advantage is taken of the above-the-barrier bound states in Br agg-confined structures, in order to extend the range of allowable incident photon energies. Numerical results are given for Al0.48In0.52As/Ga0.47In0. 53As based structure and the incident photon energy (h) over bar omega = 24 0 meV.