Transient interference implications on the subpicosecond laser damage of multidielectrics

被引:36
作者
Gallais, Laurent [1 ]
Mangote, Benoit [1 ]
Commandre, Mireille [1 ]
Melninkaitis, Andrius [2 ]
Mirauskas, Julius [2 ]
Jeskevic, Maksim [2 ]
Sirutkaitis, Valdas [2 ]
机构
[1] Aix Marseille Univ, CNRS, Ecole Cent Marseille, Inst Fresnel, F-13013 Marseille, France
[2] Vilnius State Univ, Laser Res Ctr, LT-10223 Vilnius, Lithuania
关键词
INDUCED BREAKDOWN; DIELECTRICS; FS; IONIZATION;
D O I
10.1063/1.3477961
中图分类号
O59 [应用物理学];
学科分类号
摘要
Laser-induced damage in optical thin films with subpicosecond pulses is investigated. A model dedicated to optical interference coatings and based on the rate equation for free electron generation is introduced. It takes into account the transient interference effects induced by changes in the dielectric function during the laser pulse and its feedback effect on the electron density distribution in the multilayer stack. Simulations are compared to experiments on HfO(2) and Ta(2)O(5) films with pulses ranging from 45 fs to 1 ps. It is shown that this approach can improve the interpretation of femtosecond and picosecond laser induced damage in thin films. (C) 2010 American Institute of Physics. [doi:10.1063/1.3477961]
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页数:3
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