New theory of femtosecond induced changes and nanopore formation

TL;DR

This paper proposes a new theoretical framework for femtosecond laser-induced modifications in silica, emphasizing molecular oxygen presence and nanopore formation, which could revolutionize glass-based device fabrication.

Contribution

It introduces a novel interpretation of femtosecond processing in silica, highlighting the role of molecular oxygen and nanopores, differing from previous models.

Findings

Molecular oxygen confirmed in femtosecond processed silica

Nanopores observed within nanograting structures

Distinct quenching characteristics of tetrahedral silica identified

Abstract

Recent results confirm the presence of molecular oxygen proving that recombination of dissociated silica bonds does not occur. This combined with the observation of nanopores within the nanograting structure in silica, leads to a new interpretation of femtosecond processing based on the unusual characteristics of quenching of tetrahedral silica compared to other glasses. This new approach suggests very different directions and implications for devices, including sensors, based on femtosecond laser processing of glasses.