Distortions in Z-scan spectroscopy

Yang, Qiguang; Seo, JaeTae; Creekmore, Santiel; Temple, Doyle; Mott, Andy; Min, Namkung; Yoo, KiPung; Kim, Sun Young; Jung, Sungsoo
January 2003
Applied Physics Letters;1/6/2003, Vol. 82 Issue 1, p19
Academic Journal
The sample imperfection induced distortions in the closed Z-scan curve are analyzed. It is found that both the magnitudes of the peak and valley transmittances and the shape of the curve are distorted significantly by the inhomogeneous thickness, the nonuniform nonlinearity, and the curved surfaces of the sample. The results suggest that the I-scan method is a more practical choice for the measurement of the third-order nonlinear susceptibility of an inhomogeneous sample.


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