Quantification of nonlinear absorption in ternary As-Sb-Se chalcogenide glasses

TL;DR

This study investigates the nonlinear optical properties of ternary As-Sb-Se chalcogenide glasses using Z-scan, revealing intensity-dependent absorption behaviors suitable for optical limiting applications.

Contribution

It provides the first detailed analysis of intensity-dependent third-order nonlinear absorption in specific As-Sb-Se glasses using nanosecond Z-scan technique.

Findings

Saturable absorption observed at low intensity in As40Sb7Se53

Transition to reverse saturable absorption at higher intensities

Two-photon absorption dominant in As40Sb10Se50

Abstract

In this article, we studied intensity dependent third order nonlinear optical response in ternary As40Sb7Se53 and As40Sb10Se50 chalcogenide glasses by employing nanosecond Z-scan technique. At low intensity, we observed saturable absorption in As40Sb7Se53 which makes a remarkable transition to reverse saturable absorption at higher intensities. On the other hand, when the Sb concentration increased in As40Sb10Se50, saturable absorption disappears and the sample exhibits only two-photon absorption. Experimental results further indicate that the strong two-photon absorption in our samples can be exploited to fabricate high performance solid state optical limiting devices for next generation all-optical network.