Abstract
Ferroelectric materials possess certain properties such as spontaneous polarization, domain structure, the hysteres is effect, and optical nonlinearity which attract much interest for research. Lead zirconate titanate (PZT) is one of the most researched materials for piezoelectric and electro optical applications. Recently, lanthanum modified lead titanate (PLT) has become popular because it possesses interesting properties such as a lower Curie temperature, a lower coercive field, and smaller remanent polarizations than PZT and has great potential for nonlinear optical and electro optical applications. PLT thin films were sputter deposited on fused silica substrate. We studied the second-order nonlinear optical properties in these thin films. The second harmonic generation intensities as a function of temperature were obtained. The optimum temperatures for obtaining the largest nonlinear optical coefficient have been found and the results are presented.
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