Composition distribution change inside glasses by laser induced local heating and control of temperature distribution

我们开发了一种通过高重复频率的聚焦飞秒激光脉冲照射来控制玻璃内部元素分布变化的技术。由于激光照射过程中的温度分布对元素分布的变化非常重要，我们研制了多点照射系统，使多个热源产生不同形状的温度分布。此外，通过对热变形形态的分析，阐明了热变形的温度分布以及伴随元素分布变化的热变形机理。基于已阐明的温度分布，利用多点辐照系统，我们成功地在玻璃内部获得了不同形状的元素分布。在模拟研究的基础上，阐明了元素迁移的控制因素。

We developed the technique to control the elemental distribution changes inside glasses by irradiation with focused femtosecond laser pulses at a high repetition rate. Because the temperature distribution during laser irradiation is important for elemental distribution change, we developed the multi-spots' irradiation system to make multiple heat sources which produce variously shaped temperature distribution. In addition, the temperature distribution and the mechanism of thermal deformation which is accompanied with the elemental distribution change were elucidated by analyzing the shape of thermal deformation. Based on the elucidated temperature distribution and using the multi-spots' irradiation system, we succeeded to make variously shaped elemental distributions inside glasses. The controlling factors for element migration were also elucidated based on the simulation study.