中国激光, 2014, 41 (5): 0502005, 网络出版: 2014-05-30
飞秒激光整形脉冲激发金膜的超快热弛豫特性
Ultrafast Thermal Relaxation Characteristics in Gold Film Excited by Shaped Femtosecond Laser Pulses
超快光学 飞秒激光 整形脉冲 热弛豫 双温模型 ultrafast optics femtosecond laser shaped pulse thermal relaxation two-temperature model
摘要
在传统双温模型中引入傅里叶热扩散机制，提出了一种时间序列热弛豫模型。数值研究获得了飞秒激光整形脉冲与金膜作用的跨时间尺度(飞秒～纳秒)热弛豫特性及温度场时空进化规律，并获得了双温弛豫周期与整形冲间隔的依赖关系。该研究对于澄清飞秒激光与金属作用的超快热弛豫机制，调控飞秒激光微纳加工中的超快加热过程具有重要意义。
Abstract
The temporally sequential thermal relaxation model is proposed, in which the Fourier thermal diffusion mechanism is coupled into the two-temperature model for investigation of the full temperature evolution (fs～ns) in Au films under shaped femtosecond laser pulses excitation. The termperature field relaxations in Au films are obtained by solving the model. The studies clarify the roles of different thermal relaxation mechnisms in femtosecond laser heating of metal, which have the significance for optimizing ultrafast heating processes during femtosecond laser micro-and nanofabrication.
杨青, 杜广庆, 陈烽, 吴艳敏, 司金海, 侯洵. 飞秒激光整形脉冲激发金膜的超快热弛豫特性[J]. 中国激光, 2014, 41(5): 0502005. Yang Qing, Du Guangqing, Chen Feng, Wu Yanmin, Si Jinhai, Hou Xun. Ultrafast Thermal Relaxation Characteristics in Gold Film Excited by Shaped Femtosecond Laser Pulses[J]. Chinese Journal of Lasers, 2014, 41(5): 0502005.
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