Abstract
The self-interaction methods were used to determine an anisotropy of the cubic nonlinear susceptibility χ(3) and of the nonlinear susceptibility of the fifth order in the fields χ(5) of CdS crystals in a wide spectral range. An anomalously strong anisotropy of the nonlinear susceptibility χ(5) was observed in the region of the fundamental absorption edge and it was attributed to an anisotropy of the two-photon absorption coefficient which represented a resonance contribution of intermediate exciton states. This extremely large anisotropy of χ(5) was used to record polarization holograms.
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