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SH signal intensity from (a) S1 (closed circles) and S3 (crosses), and (b) S2 (closed circles) and S4 (crosses) as a function of the incident angle of the fundamental beam, when the fundamental and SH beam are -polarized. The solid curves correspond to theoretical fitting.
The effective second-order nonlinear coefficient as a function of surface roughness addressed by RMS. The dotted line shows the Lorentzian fitting curves.
Dependence of effective second-order nonlinear coefficient as a function of grain size measured by XRD scan of . The inset of the figure shows the surface image of each ZnO films.
Basic characteristics of the investigated samples.
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