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首页> 外文期刊>Optical and quantum electronics >Energy transport in silicon-aluminum composite thin film during laser short-pulse irradiation
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Energy transport in silicon-aluminum composite thin film during laser short-pulse irradiation

机译：激光短脉冲辐照过程中硅铝复合薄膜的能量传输

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摘要

Energy transport in silicon-aluminum composite thin films due to short-pulse laser irradiation is examined. Frequency dependent phonon transport in the silicon film is considered to formulate equivalent equilibrium temperature while modified two-equation model is used in the aluminum film to obtain electron and phonon temperatures. Thermal boundary resistance across the films is incorporated in the analysis. Transmittance, reflectance, and absorption of the incident laser beam are determined using the transfer matrix method. Equivalent equilibrium temperatures resulted from frequency dependent and frequency independent solutions are compared. It is found that phonon temperature increase at the aluminum interface is suppressed by phonon transport to the silicon film, which is more pronounced at low laser pulse intensities. The influence of the ballistic phonons on equivalent equilibrium temperature in the silicon film is found to be significant.
机译：研究了由于短脉冲激光辐照导致的硅铝复合薄膜中的能量传输。硅膜中依赖于频率的声子传输被认为是公式化的等效平衡温度，而在铝膜中使用修正的两方程模型来获得电子和声子温度。薄膜中的热边界电阻被纳入分析。使用传输矩阵方法确定入射激光束的透射率，反射率和吸收率。比较了由频率相关和频率独立解决方案产生的等效平衡温度。已经发现，声子在铝界面处的温度升高被声子传输到硅膜上所抑制，这在低激光脉冲强度下更为明显。发现弹道声子对硅膜中的等效平衡温度的影响是显着的。

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