论文标题
单个脉冲状态中四种金属（Al，Cu，ni，w）的超短激光消融的测量
Measurement of ultrashort laser ablation of four metals (Al, Cu, Ni, W) in single pulse regime
论文作者
论文摘要
我们提供了四种过渡后和过渡金属（铝，铜，镍和钨）的消融的测量值，该金属被单个800 nm激光脉冲辐射，在超平脉冲状态下，从100 fs脉冲持续时间降低至15 fs，覆盖了覆盖时间范围的15 fs。对于测试的每个金属和脉搏持续时间，我们测量其消融特性（深度和直径）作为入射能的函数，使我们能够以单次射击状态确定其激光诱导的消融阈值和消融速率。对于所有研究的金属，我们观察到恒定的消融阈值随着脉冲持续时间的函数，将这种缩放定律扩展到少量光谱循环的脉冲持续时间。我们还提供了调整入射通量的兴趣的证据，以最大程度地提高能量特定的消融深度，但也没有与使用极短的脉冲持续时间用于消融目的有关的任何特殊优势。这些信息和详细的消融数据已在单个脉冲制度和空中氛围中获得。它们可以作为奖励反馈，以进一步建立飞秒激光微加工和基于金属和金属组件的激光损伤处理的智能策略，并提高飞秒激光与超超量策略中金属与金属相互作用的建模准确性。
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.
