In situ pump probe optical absorption studies on Sb/As 2S 3 nanomultilayered film

Abstract

We report the in situ optical transmission change in the complete visible region of the electromagnetic spectrum to asses the kinetics of photo induced interdiffusion in Sb/As 2S 3 nanomultilayered film. The interdiffusion of Sb into As 2S 3 matrix results in the formation of Sb–As 2S 3 ternary solid solutions which is explained by the change in optical band gap, absorption coefficients and Tauc parameter ( B 1/2) with evolution of time. The wavelength dependence of the time constants provides a better description of photo induced effects. The time evolution of the absorption coefficients and optical band gap are significantly faster in this process.