Dispersion of nonlinear refraction and two-photon absorption using a white-light continuum Z-scan.
نویسندگان
چکیده
We use a white-light continuum (WLC) Z-scan technique to measure the degenerate two-photon absorption spectrum and associated dispersion of the nonlinear refraction in ZnSe. The spectral components of the WLC source are separated by using a narrow band variable filter to minimize nondegenerate nonlinearities. We observe a change in sign of the ultrafast nonlinear refractive index around 0.7 of the bandgap energy as predicted by theory.
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ورودعنوان ژورنال:
- Optics express
دوره 13 10 شماره
صفحات -
تاریخ انتشار 2005