Nonlinear susceptibility of CdTe

A mathematical model utilizing two coupled anharmonic oscillators is applied to CdTe to predict its nonlinear susceptibility. Three of the four constants appearing in the model are determined from recent experimental data on electrooptic coefficients and second-harmonic generation in the region
3-28 \mu
. The first-order nonlinear susceptibilities appearing in expressions for second-harmonic generation and the electrooptic coefficient are then obtained as a function of frequency in order to illustrate the dispersion in the region
1-300 \mu
.