Thermal regime of laser ablation of metals by ultrashort pulses of low fluence

被引：12

作者：

Afanasiev, YV ^{[1
]}

Chichkov, BN ^{[1
]}

Isakov, VA ^{[1
]}

Kanavin, AP ^{[1
]}

Uryupin, SA ^{[1
]}

机构：

[1] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, Russia

来源：

JOURNAL OF RUSSIAN LASER RESEARCH | 1999年 / 20卷 / 03期

关键词：

D O I：

10.1007/BF02508538

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Thermal ablation of a metal surface by low-energy ultrashort laser pulses is considered theoretically. The temporal dynamics of the surface electron and lattice temperatures is studied within the framework of the two-temperature model and for different temperature dependences of the characteristics of the metal (electron-relaxation time, heat capacity, thermal conductivity). The approximation of evaporation into a vacuum is used to determine the ablation depth. Analytical expressions for the ablation-threshold fluence F-th as well as the threshold values of the lattice temperature T-th(F-th) and the characteristic time of lattice temperature decay t(d)(F-th) are obtained. This analytical description is in satisfactory agreement with particular numerical calculations.

引用

页码：189 / 201

页数：13