论文标题
超快激光加热固体的过渡状态
Transition regime in the ultrafast laser heating of solids
论文作者
论文摘要
基于热扩散的现象学理论，我们表明吸收激光脉冲后生成的峰温度$ t _ {\ text {max}} $很大程度上取决于脉冲持续时间。我们确定了三种不同的热传导状态，可以通过一个简单的参数识别，该参数仅取决于脉冲持续时间和材料常数。现象学方法通过用1 ps和10 NS光学脉冲的瞬时光栅激发后的热表面膨胀的数值模拟来支持现象学方法。
Based on the phenomenological theory of heat diffusion, we show that the generated peak temperature $T_{\text{max}}$ after absorption of a laser pulse strongly depends on the pulse duration. We identify three different heat conduction regimes which can be identified via a simple parameter that depends only on the pulse duration and on material constants. The phenomenological approach is supported by numerical simulations of heat diffusion and measurements of the thermal surface expansion after transient grating excitation with 1 ps and 10 ns optical pulses.
