Ultrafast dynamics of laser thermal excitation in gold film triggered by temporally shaped double pulses


          

刊名：International Journal of Thermal Sciences
作者：Yang, Qing（）
Chen, Feng（Xi An Jiao Tong Univ, Sch Elect & Informat Engn, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China）
Ou, Yan
Wu, Yanmin
Hou, Xun
Du, Guangqing
刊号：725F0002
ISSN：1290-0729
出版年：2015
年卷期：2015, vol.90
页码：197-202
总页数：6
分类号：TK1
关键词：Shaped femtosecond laser；Pulse energy ratio；Pulse exchange；Thermalization process
参考中译：
语种：eng
文摘：We present the theoretical studies on ultrafast thermal excitation dynamics of gold film irradiated by temporally shaped femtosecond laser double pulses. It is revealed that the gold film thermalization efficiency can be greatly promoted by optimizing the pulse energy ratio, pulse separation and pulse exchange of temporally shaped femtosecond double pulses. The phenomena are explained as the enhanced laser energy coupling into the electron subsystem due to the interplay of pulse-to-pulse energy coupling. This study should be helpful for basic understanding of the ultrafast thermal dynamics for optimizing the gold film excitation process via shaping femtosecond laser for the potential applications such as thermal plastic deformation effects, laser ablation and laser excitation spectrum. (C) 2014 Elsevier Masson SAS. All rights reserved.



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