Saturation of dynamic nonlinear susceptibility of noble gas atom in intense laser field
نویسندگان
چکیده
We investigate the nonlinear susceptibility of noble gas atom interacting with intense laser field. The solution is obtained by solving the time dependent Schrödinger equation. It is shown that the behavior of nonlinear susceptibility strongly depends on the intensity; it increases almost linearly in low intensity regime, then becomes saturated at higher intensity. Furthermore it is also shown that at intensity beyond the saturation value, the nonlinear susceptibility is substantially induced by the ionization of the atom, leading to avalanche break down of the refractive index.
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