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Development in laser induced extrinsic absorption damage mechanism of dielectric films

机译:介电薄膜的激光诱导本征吸收损伤机理研究进展

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摘要

Absorption of host and the temperature-dependence of absorption coefficient have been considered in evaluating temperatures distribution in films, when laser pulse irradiates on films. Absorption of dielectric materials experience three stages with the increase of temperature: multi-photon absorption; single photon absorption; metallic absorption. These different absorption mechanisms correspond to different band gap energies of materials, which will decrease when the temperature of materials increases. evaluating results indicate that absorption of host increases rapidly when the laser pulse will be over. If absorption of host and the temperature-dependence of absorption are considered, the material temperatures in films will be increased by a factor of four.
机译:当评估激光脉冲在胶片上的温度分布时,已经考虑了主体的吸收和吸收系数的温度依赖性。随着温度的升高,介电材料的吸收经历了三个阶段:多光子吸收;单光子吸收金属吸收。这些不同的吸收机制对应于材料的不同带隙能量,当材料的温度升高时,该能量将减小。评价结果表明,当激光脉冲结束时,宿主的吸收迅速增加。如果考虑主体的吸收和吸收的温度依赖性,则膜中的材料温度将增加四倍。

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