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Electric field-induced second harmonic (EFISH) generation effect in paraelectric lanthanum doped lead zirconate-titanate ceramics (PLZT) has been utilized in the local oscillator device of nonlinear optical heterodyne interferometer. Application of PLZT X/65/35 plates in low frequency rotating electric field as the reference sources of EFISH for interferometric analysis of anisotropy of thin films or surfaces of crystals is proposed. Experimental details and properties of multiphase PLZT EFISH modulator has been discussed.
Acknowledgments
We are pleased to acknowledge stimulating discussions with V. Zauls, E. Klotins, P. Kreicbergs, J. Kotleris. The authors thank M. Livinsh (Institute of Solid State Physics, Riga) for kindly supplaying PLZT samples. Presented investigations were supported by the Latvian Science Council (Grant No 05.1877) and European Structural Funding Project “Support for PhD and postdoctoral research in natural sciences and information technologies,” Daugavpils University, Project No 1.
Paper originally presented at IMF-11, Iguassu Falls, Brazil, September 5–9, 2005;