  Efficient third-order nonlinearities of the Zinc Oxide and Al-doped Zinc
Oxide were studied by Third Harmonic Generation (Third Harmonic Generation)
Maker fringes to establish the effect Aluminum of Aluminum doping(Al-doping) on
the cubic nonlinearities. The addition of the Al-dopant to the Zinc Oxide
crystal structure results in changes that affected the optical and nonlinear
characteristics. Presented results indicate that magnitude of the third-order
nonlinear susceptibility tensor was enhanced at single experimental
wavelengths, however, across the broadband experimental spectrum the effect of
Al-doping remained relatively constant. The observed enhancement of third-order
nonlinearity was purely from the bound electronic response and the observation
is attributed to increased charge carriers and spontaneous polarization in the
Zinc Oxide and Al-doped Zinc Oxide crystal structure.
