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arXiv 2010.16151physics.opticsphysics.app-ph
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四种金属（Al，Cu，Ni，W）单脉冲超短脉冲laser烧蚀的测量

Measurement of ultrashort laser ablation of four metals (Al, Cu, Ni, W) in single pulse regime

Thibault Genieys, Marc Sentis, Olivier Utéza

发表信息：
Advanced Optical Technologies, 2020, 9 (3), pp.131-143
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摘要：

我们提供了四个后过渡和过渡金属（铝，铜，镍和钨）的烧蚀测量单800 nm的激光脉冲照射，在超短政权从100 fs的脉冲持续时间下降到15 fs覆盖的时间范围很少探索尚未。对于测试的每种金属和脉冲持续时间，我们测量其烧蚀特征（深度和直径）作为入射能量的函数，使我们能够确定其单次发射状态下的激光诱导烧蚀阈值和烧蚀率。对于所有研究的金属，我们观察到恒定的烧蚀阈值通量作为脉冲持续时间的函数，将此比例定律扩展到几个光周期的脉冲持续时间。我们还提供了证据的利益，调整入射能量密度，以最大限度地提高能量比消融深度，但也没有任何特殊的优势，使用极短的脉冲持续时间的消融目的。这些信息和详细的烧蚀数据已在单脉冲制度和空气气氛中获得。它们可以作为有益的反馈，进一步建立智能策略飞秒激光微加工和激光损伤处理的金属和金属基组件，以及提高精度的飞秒激光与金属相互作用的建模在超短政权。

英文摘要：

We provide measurements of ablation of four post-transition and transition metals (aluminum, copper, nickel and tungsten) irradiated by single 800 nm laser pulses, in ultrashort regime from 100 fs pulse duration down to 15 fs covering a temporal range little explored yet. For each metal and pulse duration tested, we measure its ablation characteristics (depth and diameter) as a function of incident energy allowing us to determine its laser-induced ablation threshold and ablation rate in single-shot regime. For all metals studied, we observe constant ablation threshold fluence as a function of pulse duration extending this scaling law to pulse duration of few-optical-cycles. We also provide evidence of the interest of adjusting the incident fluence to maximize the energy specific ablation depth but also of the absence of any peculiar advantage related to the use of extremely short pulse duration for ablation purposes. Those informative and detailed ablation data have been obtained in single pulse regime and in air ambiance. They can serve as rewarding feedback for further establishing smart strategy for femtosecond laser micromachining and laser damage handling of metallic and metal-based components as well as for enhancing accuracy of modeling of femtosecond laser interaction with metals in ultrashort regime.

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