Crystalline phase responsible for the permanent second-harmonic generation in chalcogenide glass-ceramics

Marie Guignard (1) , Virginie Nazabal (1) , Xianghua Zhang (1) , Frédéric Smektala (1) , Alain Moréac (2) , Stanislav Pechev (3) , Hassina Zeghlache (4) , Alexandre Kudlinski (4) , Gilbert Martinelli (4) , Yves Quiquempois (4)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 GMCM - Groupe matière condensée et matériaux
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
4 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523

Permanent second-harmonic generation (SHG) has been demonstrated in chalcogenide based glass-ceramics containing non-linear micro-crystals with a size of a few micrometers. A glass composition from the Ge-Sb-S system was chosen as the reference glass for its stability against crystallization and atmospheric corrosion. Metallic cadmium was introduced in this matrix to promote crystallite formation resulting in infrared transparent glass-ceramics. A volume crystallization of β-GeS2 phase was obtained within the glass media by heating the glass samples at 370 °C for different durations. The glass-ceramics were then investigated by Raman spectroscopy, X-ray diffraction and NanoSIMS. The second-order non-linear signals were recorded by using Maker fringes experiment and were studied as a function of the crystallized volume fraction. The results indicated a non-linearity in chalcogenide glass-ceramics about one hundred times lower than α-quartz for a 1 mm thick sample heat treated 144 h.

Mots clés: Chalcogenide glasses; Infrared glass-ceramics; Second- harmonic generation; NanoSIMS; Raman spectroscopy

Domaines: Matériaux

Marie Guignard, Virginie Nazabal, Xianghua Zhang, Frédéric Smektala, Alain Moréac, et al.. Crystalline phase responsible for the permanent second-harmonic generation in chalcogenide glass-ceramics. Optical Materials, 2007, 30 (2), pp.338-345. ⟨10.1016/j.optmat.2006.07.021⟩. ⟨hal-00172320⟩