Time-resolved measurement of surface diffusion induced by femtosecond laser pulses -: art. no. 236103

被引：60

作者：

Stépán, K

Güdde, J

Höfer, U

机构：

[1] Univ Marburg, Fachbereich Phys, D-35032 Marburg, Germany

[2] Univ Marburg, Zentrum Mat Wissensch, D-35032 Marburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.94.236103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Diffusion of atomic oxygen on a vicinal Pt(111) surface induced by femtosecond laser pulses has been studied using optical second-harmonic generation as a sensitive in situ probe of the step coverage. Time-resolved studies of the hopping rate for step-terrace diffusion with a two-pulse correlation scheme reveal a time constant of 1.5 ps for the energy transfer from the electronic excitation of the substrate to the frustrated translations of the adsorbate.

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