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Proceedings Paper

Temperature field simulation of phase change material/metal bilayer structure upon femtosecond laser pulse irradiation
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Paper Abstract

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.

Paper Details

Date Published: 12 October 2016
PDF: 9 pages
Proc. SPIE 9818, 2016 International Workshop on Information Data Storage and Tenth International Symposium on Optical Storage, 981814 (12 October 2016); doi: 10.1117/12.2249262
Show Author Affiliations
Kai Lei, Shanghai Institute of Optics and Fine Mechanics (China)
Minghui Jiang, Shanghai Institute of Optics and Fine Mechanics (China)
Yang Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Yiqun Wu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 9818:
2016 International Workshop on Information Data Storage and Tenth International Symposium on Optical Storage
Fuxi Gan; Zhitang Song; Yang Wang, Editor(s)

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