Heat transport in metals irradiated by ultrashort laser pulses

被引：110
|
作者：
Kanavin, AP
Smetanin, IV
Isakov, VA
Afanasiev, YV
Chichkov, BN
Wellegehausen, B
Nolte, S
Momma, C
Tunnermann, A
机构：
[1] PN Lebedev Phys Inst, Moscow 117924, Russia
[2] Univ Hannover, Inst Quantenopt, D-30167 Hannover, Germany
[3] Laser Zentrum Hannover EV, D-30419 Hannover, Germany
来源：
PHYSICAL REVIEW B | 1998年 / 57卷 / 23期
关键词：
D O I：
10.1103/PhysRevB.57.14698
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Different regimes of heat propagation in metals irradiated by subpicosecond laser pulses are studied on the basis of a two-temperature diffusion model. Analytical solutions for the heat conduction equation, corresponding to the different temperature dependences of the electron thermal conductivity, are obtained. It is shown that in case of a strong electron-lattice nonequilibrium, the heat penetration depth grows linearly with time, and the heat propagation velocity decreases with increasing laser fluence. Investigations of this "counterintuitive" regime of heat propagation are performed.
引用
收藏
页码：14698 / 14703
页数：6
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