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飞秒激光加热金属薄膜时会在金属内部形成电子温度和晶格温度不平衡的热输运过程,此过程一般可以用抛物两步模型描述。飞秒激光抽运-探测技术可以对上述过程中金属表面的瞬时电子温度进行测量。通过上述实验结果结合抛物两步模型,反推金属微尺度热物性参数是一个反演问题。本文分析了此反演问题求解的可行性,并采用遗传算法对此反演问题进行了求解。
Femtosecond laser heating metal film will be formed within the metal electron temperature and lattice temperature imbalance of heat transport process, the process can generally be described by a parabolic two-step model. The femtosecond laser pump-probe technology measures the instantaneous electron temperature of metal surfaces in the above process. Through the above experimental results combined with the parabolic two-step model, the backstepping metal micro-scale thermophysical parameters is an inverse problem. This paper analyzes the feasibility of solving this inversion problem, and solves this inversion problem using genetic algorithm.