外文题目: Temperature field simulation of phase change material/metal bilayer structure upon femtosecond laser pulse irradiation
作者: Lei, Kai; Jiang, Minghui; Wang, Yang; Wu, Yiqun
刊名: Proc.SPIE
来源图书: 2016 International Workshop on Information Data Storage and Tenth International Symposium on Optical Storage
年: 2016 卷: 9818 文章编号：981814
会议名称: International Workshop on Information Data Storage / 10th International Symposium on Optical Storage
英文关键词:
Phase change materials; two-temperature model; electron temperature; lattice temperature
NONEQUILIBRIUM ELECTRONIC PROCESSES; SEMICLASSICAL 2-TEMPERATURE MODEL; METAL-FILMS; STORAGE
英文摘要:
The thermal transmission process induced by single-shot femtosecond laser pulses in Sb70Te30 phase change thin films with or without a Ag thermal-conductive layer was studied numerically with a two-temperature model. The distribution of electron and lattice temperatures was calculated by a one-dimensional finite difference method. The different temperature evolution characteristics on different time scales (from several picoseconds, to tens of picoseconds and to several nanoseconds) are discussed based on the electron-phonon coupling theory. The influence of a special point in the lattice temperature evolution curves on the crystallization time of phase change thin films is analyzed. The results will be helpful to the deeper understanding of the ultrafast phase transition mechanism of phase change memory materials.


文献类型: 会议论文
正文语种: English
收录类别: ISTP
DOI: 10.1117/12.2249262


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