Size Effects on Nonequilibrium Laser Heating of Metal Films
Size Effects on Nonequilibrium Laser Heating of Metal Films
复制标题
DOI：
10.1115/1.2911378
复制
发表时间：
1993-11
影响因子：
--
通讯作者：
T. Qiu;C. Tien
中科院分区：
文献类型：
--
作者：
T. Qiu;C. Tien
皮秒和亚皮秒激光器已成为微结构制造和研究的重要工具。当激光脉冲持续时间变得与微观载能体之间能量交换的特征时间相当或更短时，受激载子不再与其他载子处于热平衡，从而产生非平衡加热情况。金属中界面的存在为电子提供了额外的散射过程，这反过来又影响了非平衡加热过程。本文研究了由于表面散射和晶界散射引起的尺寸效应对热导率和电子与材料晶格之间的能量交换的影响
Picosecond and sub-picosecond lasers have become important tools in the fabrication and study of microstructures. When the laser pulse duration becomes comparable with or less than the characteristic time of energy exchange among microscopic energy carriers, the excited carriers are no longer in thermal equilibrium with the other carriers, creating a nonequilibrium heating situation. The presence of interfaces in metals provides additional scattering processes for electrons, which in turn affects the nonequilibrium heating process. This work studies size effects, due to both surface scattering and grain-boundary scattering, on the thermal conductivity and the energy exchange between electrons and the material lattice