Nondegenerate Optical Kerr Effect in Semiconductors
نویسندگان
چکیده
We calculate the nondegenerate bound electronic nonlinear refractive index n2 ( w1; w2) (i.e., an index change at frequency w1 due to the presence of a beam at frequency w2) in semiconductors. We calculate this nonlinearity and its disper~ sion using a Kramers-Kronig transformation on the calculated nondegenerate nonlinear absorption spectrum due to two-photon absorption, electronic Raman and optical Stark effects. The calculated n2 values and their dispersion are compared to new experimental values for ZnSe and ZnS obtained using a 2-color Z-scan.
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