激光熔融锑化铟的时间分辨X射线散射

Time-resolved x-ray scattering from laser-molten indium antimonide.

作者信息

Nüske R, v Korff Schmising C, Jurgilaitis A, Enquist H, Navirian H, Sondhauss P, Larsson J

机构信息

Department of Physics, Atomic Physics Division, Lund University, P.O. Box 118, Lund SE-221 00, Sweden.

出版信息

Rev Sci Instrum. 2010 Jan;81(1):013106. doi: 10.1063/1.3290418.

DOI:10.1063/1.3290418

PMID:20113080

Abstract

We demonstrate a concept to study transient liquids with picosecond time-resolved x-ray scattering in a high-repetition-rate configuration. Femtosecond laser excitation of crystalline indium antimonide (InSb) induces ultrafast melting, which leads to a loss of the long-range order. The remaining local correlations of the liquid result in broad x-ray diffraction rings, which are measured as a function of delay time. After 2 ns the liquid structure factor shows close agreement with that of equilibrated liquid InSb. The measured decay of the liquid scattering intensity corresponds to the resolidification rate of 1 m/s in InSb.

摘要

我们展示了一种在高重复率配置下，利用皮秒时间分辨X射线散射来研究瞬态液体的概念。飞秒激光激发晶体锑化铟（InSb）会引发超快熔化，进而导致长程有序性的丧失。液体中剩余的局部相关性会产生宽X射线衍射环，这些衍射环会作为延迟时间的函数进行测量。2纳秒后，液体结构因子与平衡态液体InSb的结构因子显示出密切的一致性。所测量的液体散射强度的衰减对应于InSb中1米/秒的再凝固速率。