Hot electrons blast wave generated by femtosecond laser pulses on thin Au(111) crystal, monitored by subpicosecond X-ray diffraction

被引：31

作者：

Chen, J

Tomov, IV

Elsayed-Ali, HE

Rentzepis, PM ^{[1
]}

机构：

[1] Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA

[2] Old Dominion Univ, Dept Elect & Comp Engn, Norfolk, VA 23529 USA

来源：

CHEMICAL PHYSICS LETTERS | 2006年 / 419卷 / 4-6期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.cplett.2005.12.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Femtosecond time-resolved X-ray diffraction is used to probe reversible lattice changes of a 150-nm Au(1 11) crystal on mica heated with 100-femtosecond laser pulses with fluence below the damage and melting threshold. The lattice strain generated throughout the crystal is larger than estimated from the inhomogeneous lattice temperature distribution and acoustic wave produced by nonequilibrium heating. The broadening and shift of the rocking curve observed across the depth of the crystal support the presence of an additional 'blast' wave arising from hot electron gas temperature gradient, which is observed experimentally for the first time. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：374 / 378

页数：5

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