报告题目 (Title)：Functionalizing glasses femtosecond by laser for high temperature applications – trends, limits and opportunities（飞秒激光诱导高温应用中玻璃功能化—趋势、限制以及机遇）

报告人 (Speaker)：Matthieu Lancry 教授（巴黎萨克雷大学）

报告时间 (Time)：2024年12月09日 (周一) 13:30-15:30

报告地点 (Place)：校本部 G313

邀请人 (Inviter)：戴晔

主办部门：理学院物理系

摘要 (Abstract)：

This talk provides an overview of the thermal stability of volume nanogratings inscribed in more than 20 laboratory and commercial oxide glasses using femtosecond laser pulses. The role of glass composition and its viscosity temperature dependence are particularly investigated. Other parameters, such as nanostructure morphology (e.g., porosity size) can play a role in it. Although it has become established that high viscosity glasses typically yield improved thermal stability, recent results highlight deviations from this trend. This is particularly pronounced in low SiO2 containing glasses with large Al2O3 content (typ. > 50 mol%), where their nanogratings thermal stability is comparatively higher than what is known for pure silica, which may prove useful for optical devices operating in extreme environments.