Second harmonic generation in germanotellurite bulk glass-ceramics

Lo Nhat Truong (1) , Marc Dussauze (2) , Mathieu Allix (3) , Sébastien Chenu (4) , Thierry Cardinal (5) , Evelyne Fargin (5) , Luis F. Santos (6)

1 Faculty of Applied Sciences
2 ISM - Institut des Sciences Moléculaires
3 CEMHTI - Conditions Extrêmes et Matériaux : Haute Température et Irradiation
4 SPCTS-AXE3 - Axe 3 : organisation structurale multiéchelle des matériaux
5 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
6 CQE - Centro de Quimica Estrutural

In this study, we have investigated the use of silver cation as nucleating agent in germanotellurite glass matrix of compositions (100−x) [70TeO2–10GeO2–10Nb2O5–10K2O]–xAg2O (x=0-6 mol%), in order to promote bulk crystallization. Density measurements, differential scanning calorimetry, X-ray diffraction, UV-Vis, and Raman spectroscopies have been performed to study the crystallization process. We have observed bulk crystallization of a unique noncentrosymmetric phase, K[Nb1/3Te2/3]2O4.8, which has been investigated for its second-order optical activity. Transparent to translucent glass-ceramics have been successfully tailored under thermal treatment and second harmonic generation signals were recorded on the glass-ceramic samples as a function of their synthesis procedure. It is suggested that the second-order optical properties observed are strongly related to the organization of crystallites within phase-separated domains.

Domaines: Matériaux

Lo Nhat Truong, Marc Dussauze, Mathieu Allix, Sébastien Chenu, Thierry Cardinal, et al.. Second harmonic generation in germanotellurite bulk glass-ceramics. Journal of the American Ceramic Society, 2017, 100 (4), pp.1412-1423. ⟨10.1111/jace.14745⟩. ⟨hal-01528796⟩