Linear and third-order nonlinear optical properties of chalcogenide glasses within a GeS2-Sb2S3-CsCI pseudo-ternary system

In this work, we characterized the optical transmittance, optical band gap, nonlinear refraction and nonlinear absorption of a series of GeS2-Sb2S3-CsCl chalcogenide glasses, and monitored their compositional dependencies. We found that the number of lone-pair electrons and the bandgap energy are two dominate factors that determined these linear and third-order nonlinear optical properties. Besides, evaluation of figure of merit verified that the GeS2-Sb2S3-CsCl glasses are suitable for optical limiting devices. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement