Influence of nonlinear- and saturable-absorption on laser lift-off threshold of oxide/metal structure

TL;DR

This paper presents a new model incorporating nonlinear and saturable absorption effects to predict the laser lift-off threshold of oxide/metal structures, validated by experimental results.

Contribution

The study introduces a novel model that accounts for nonlinear absorption effects in laser lift-off processes, aligning well with experimental data.

Findings

Model accurately predicts threshold changes with laser intensity.

Nonlinear absorption significantly affects lift-off threshold.

Experimental validation confirms model reliability.

Abstract

In this work, a new model of effective lift-off threshold of oxide/metal target is presented. The influence of nonlinear processes in the oxide layer on its removal from the metallic samples using picosecond laser was investigated. Nonlinear and saturable absorption in the layer was incorporated into modeling for prediction of effective laser lift-off threshold fluence change with varying peak intensities in z-scan type experiment for the first time. The new model coincides well with the experimental results.