Expansion of matter heated by an ultrashort laser pulse
Expansion of matter heated by an ultrashort laser pulse
复制标题
超短激光脉冲加热物质的膨胀
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
J. Meyer
中科院分区：
文献类型：
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作者：
N. Inogamov;Y. Petrov;S. Anisimov;A. Oparin;N. Shaposhnikov;D. Linde;J. Meyer
最近的实验利用高功率亚皮秒激光脉冲来实现超快加热的凝聚材料的温度远远高于临界温度。使用光学诊断，它建立了一个复杂的密度分布与尖锐的梯度，基本上不同于普通的稀疏波，在膨胀的加热物质的形式。本文分析了在D. von der Linde，K. Sokolowski-Tinten和J. Bialkowski，Appl. Surf. Science 109/110，1（1996）; K.作者声明：A. Cavalleri等人，Proc. Soc. Photo-Opt. Instum. 3343，46（1998）;和，K.作者声明：A. Cavalleri等人，物理学评论快报81，224（1998）。结果表明，当卸载流体通过两相区时，膨胀材料中形成一个充满低密度两相物质的薄液壳。壳以恒定速度运动。两相材料中的速度是坐标的线性函数（均匀变形的流动），密度与坐标无关，并随时间t-1而减小。
Recent experiments have utilizied high-power subpicosecond laser pulses to effect the ultrafast heating of a condensed material to temperatures far above the critical temperature. Using optical diagnostics it was established that a complicated density profile with sharp gradients, differing substantially from an ordinary rarefaction wave, forms in the expanding heated matter. The present letter is devoted to the analysis of the expansion of matter under the conditions of the experiments reported by D. von der Linde, K. Sokolowski-Tinten, and J. Bialkowski, Appl. Surf. Science 109/110, 1 (1996); K. Sokolowski-Tinten, J. Bialkowski, A. Cavalleri et al., Proc. Soc. Photo-Opt. Instum. Eng. 3343, 46 (1998); and, K. Sokolowski-Tinten, J. Bialkowski, A. Cavalleri et al., Phys. Rev. Lett. 81, 224 (1998). It is shown that if the unloading adiabat passes through the two-phase region, a thin liquid shell filled with low-density two-phase matter forms in the expanding material. The shell moves with a constant velocity. The velocity in the two-phase material is a linear function of the coordinate (flow with uniform deformation), and the density is independent of the coordinate and decreases with time as t−1.