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首页> 外文会议>ASME summer heat transfer conference >TRANSIENT OPTICAL AND THERMAL RESPONSE OF METAL FILMS INDUCED BY ULTRASHORT-PULSED LASERS
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TRANSIENT OPTICAL AND THERMAL RESPONSE OF METAL FILMS INDUCED BY ULTRASHORT-PULSED LASERS

机译：超短脉冲激光诱导的金属膜的瞬态光学和热响应

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In this paper, a critical point model with three Lorentzian terms for interband transition was proposed for dielectric permittivity of metal films. After validated, it was incorporated into a two-temperature model (TTM) to study transient optical and thermal response for a copper film irradiated by an ultrashort laser pulse. The dynamic changes of reflectivity (R) and absorptivity coefficient (α) during laser irradiation, electron and lattice temperature, and phase change were investigated. It was shown that for an ultrashort laser pulse with relatively high laser fluence, both if and a could drastically decrease, leading to significantly different thermal response than that described by using constant R and a at room temperature (RT).
机译：本文提出了一种具有三个洛伦兹的间带贯型转换术语的关键点模型，用于金属膜的介电常数。经过验证后，将其掺入两种温度模型（TTM）中，以研究由超短激光脉冲照射的铜膜的瞬态光学和热响应。研究了激光照射，电子和晶格温度和相变期间反射率（R）和吸收性系数（α）的动态变化。结果表明，对于具有相对高的激光脉冲的超短激光脉冲，IF和A可能会急剧下降，导致比在室温（RT）在室温（RT）上描述的显着不同的热响应。

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