Ultrafast thermalization characteristics in Au film irradiated by temporally shaped femtosecond laser pulses

被引：14
作者：
Du, Guangqing
Chen, Feng [1 ]
Yang, Qing
Si, Jinhai
Hou, Xun
机构：
[1] Xi An Jiao Tong Univ, Minist Educ, Key Lab Phys Elect & Devices, Xian 710049, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2011年 / 284卷 / 02期
基金：
美国国家科学基金会;
关键词：
Thermalization characteristics; Femtosecond pulse train; Two temperature relaxation; Thermal diffusion relaxation; ABLATION; ELECTRON; RELAXATION; SILICON; DAMAGE;
D O I：
10.1016/j.optcom.2010.09.061
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The ultrafast thermalization processes of Au film irradiated by multi-pulse sequences with variable temporal separation were investigated by numerical simulations. Two temporally sequential thermal relaxation mechanisms including the two temperature relaxation and the thermal diffusion relaxation were demonstrated. With inclusion of the electron ballistic effect, we obtained the full 2-D temperature fields evolution dominated by the two distinct relaxation mechanisms. It is proposed that the laser thermalization processes can be greatly promoted through choosing the optimized temporal separation of the pulse train. We also found that the two temperature relaxation period can be modulated by changing the pulse train parameters such as the temporal separation, the pulse durations and the pulse number in a train. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：640 / 645
页数：6
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