The methods of small angle synchrotron radiation scattering, vibration spectroscopy, and second harmonic generation are applied to glasses of the K2O-TiO2-P2O5 system near the stoichiometry of potassium titanyl-phosphate to demonstrate that at the initial stage of phase sepn., while glass remains x-ray amorphous and clear, it can possess quadratic optical nonlinearity. The emergence of nonlinearity is facilitated by the formation of nanoheterogeneities in glass whose structure resembles the structural pattern of a nonlinear-optical crystal. A correlation established between the structural specifics of x-ray amorphous glass and its quadratic optical nonlinearly suggests the advisability of describing the short-range and medium-range orders of glasses at the glass-formation boundary in the context of quasicrystallite models.
Correlation between atomic structure, structural nanoinhomogeneity, and quadratic optical nonlinearity in glasses of the K2O-TiO2-P2O5 system / V. N., Sigaev; S. V., Lotarev; P. D., Sarkisov; E. N., Smelyanskaya; O. V., Akimova; Stefanovich, S. Y. U.; B., Champagnon; D., Wagner; A. A., Volkov; G. A., Komandin; V. V., Koltashev; V. G., Plotnichenko; Pernice, Pasquale; Aronne, Antonio. - In: GLASS AND CERAMICS. - ISSN 0361-7610. - STAMPA. - 63:(2006), pp. 7-11.
Correlation between atomic structure, structural nanoinhomogeneity, and quadratic optical nonlinearity in glasses of the K2O-TiO2-P2O5 system
PERNICE, PASQUALE;ARONNE, ANTONIO
2006
Abstract
The methods of small angle synchrotron radiation scattering, vibration spectroscopy, and second harmonic generation are applied to glasses of the K2O-TiO2-P2O5 system near the stoichiometry of potassium titanyl-phosphate to demonstrate that at the initial stage of phase sepn., while glass remains x-ray amorphous and clear, it can possess quadratic optical nonlinearity. The emergence of nonlinearity is facilitated by the formation of nanoheterogeneities in glass whose structure resembles the structural pattern of a nonlinear-optical crystal. A correlation established between the structural specifics of x-ray amorphous glass and its quadratic optical nonlinearly suggests the advisability of describing the short-range and medium-range orders of glasses at the glass-formation boundary in the context of quasicrystallite models.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.