Multispectral glasses transparent from the visible up to the thermal infrared in GeSe2-Ga2Se3-CsI system

Antoine Bréhault (1) , Laurent Calvez (1) , Philippe Adam (2) , Joel Rollin (3) , Xiang-Hua Zhang (1)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 DGA - Direction générale de l'armement [Bagneux]
3 Thales Angénieux SA

This work is based on the development of glasses transparent from the visible to the thermal IR. A study of the chalco-halide system GeSe2-Ga2Se3-CsI has been realized and some compns. allow the synthesis of multi-spectral glasses transparent from 0,6 to 16 μm. Indeed, the addn. of CsI in the glassy matrix GeSe2-Ga2Se3 enable to shift the band-gap cutoff to lower wavelength. This addn. will also induce a weaker resistance to corrosion. A compromise between a good transparency and an acceptable resistance is desirable. Moreover, an antireflective coating would allow to optimized the chem. durability of the glass and avoid the contact from atm. moisture.

Domaines: Chimie

Antoine Bréhault, Laurent Calvez, Philippe Adam, Joel Rollin, Xiang-Hua Zhang. Multispectral glasses transparent from the visible up to the thermal infrared in GeSe2-Ga2Se3-CsI system. Matériaux & Techniques, 2015, 103 (4), pp.403/1--403/7. ⟨10.1051/mattech/2015038⟩. ⟨hal-01295519⟩