Nonlinear optical composites based on oxide glasses and ferroelectricsстатья
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Web of Science
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Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
Аннотация:In spite of the interest in nonlinear optical (NLO) properties in glasses, the composite method has been succeessful only for the beta-BaB2O4 Polar Crystal incorporated in the borosilicate glass matri.y. In the present paper, transparent composites based on low melting borate and boron silicate glasses containing PbO or TeO2 and KNbSi2O7 ferroelectric crystal are obtained by a remelting technology. Depending on glass composition, NLO composites are subdivided in two types. The first are composites containing micron or submicron sealed crystals with a high second harmonic generation (SHG) activity, where refractive indexes of crystals and glass matrix are very similar Such a type of transparent composites is expected to achieve SHG activity in the future comparable with that of single crystals. The second type are 'nanocoinposites' where initial crystals are dissolved or transformed up to nanoscaled sizes. They are considered to be an analogue of nanostructured glasses exhibiting moderate second order optical nonlinearity.