Preparation and third-order optical nonlinearity of glass ceramics based on GeS(2)-Ga(2)S(3)-CsCl pseudo-ternary system

Abstract

Chalcohalide glass-ceramics based on GeS2-Ga2S3-CsCl pseudo-ternary system were prepared by heat treatment method. X-ray diffraction and scanning electron microscope studies confirmed the formations of Ga2S3 and GeS2 phase grains with sizes of 2-5 and 80 nm, respectively. Z-scan technology was employed to investigate the third-order nonlinear optical characteristics of both precursor glass and its glass ceramics at 800 nm. The results show that nonlinear refractive index n(2) as well as nonlinear absorption coefficient 13 increase after heat treatment, which is due to quantum effects, and the largest n2 of the glass ceramics is 4.3 x 10(-11) esu which is 4 times larger than that of the host. (C) 2011 Elsevier B.V. All rights reserved.