Wang Bin, Gallais Laurent
Institut Fresnel, CNRS, Aix-Marseille Université, Ecole Centrale Marseille, Campus de St Jérôme, 13013 Marseille, France.
Opt Express. 2013 Jun 17;21(12):14698-711. doi: 10.1364/OE.21.014698.
An approach for the theoretical evaluation of the damage threshold in optical interference coatings that combine metal and dielectric films is presented. The model that is used combines a matrix formalism to describe the film system with the two temperatures model that describes the energy transfer and the temperatures of electrons and lattice in a solid submitted to a laser irradiation at the femtosecond time scale. With this approach the thermal consequences due to the ultrafast absorption of the metal film can be evaluated in the multilayer stack for single or multiple pulses. Some applications are presented for the case of broadband mirrors for ultrashort pulses with low dispersion. Particularly we study the impact of the metal film (metal element, thickness) and the design on the Laser Induced Damage Threshold in the sub picosecond regime.
本文提出了一种用于理论评估由金属膜和介质膜组成的光学干涉涂层损伤阈值的方法。所使用的模型将描述薄膜系统的矩阵形式与双温度模型相结合，该双温度模型用于描述在飞秒时间尺度下受到激光辐照的固体中电子和晶格的能量转移及温度。通过这种方法，可以评估金属膜超快吸收在多层膜堆中对单脉冲或多脉冲产生的热效应。文中给出了一些针对低色散超短脉冲宽带镜的应用实例。特别地，我们研究了金属膜（金属元素、厚度）以及设计对亚皮秒 regime 下激光诱导损伤阈值的影响。
