Laser-induced short-range disorder in aluminum revealed by ultrafast electron diffuse scattering

We report ultrafast electron diffuse scattering intensity (DSI) measurement in order to study the structural response of aluminum to femtosecond laser excitation. In this measurement, the evolutions of DSI and Bragg peak intensities after the laser excitation are measured and compared in the time do...

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Bibliographic Details
Published inApplied physics letters Vol. 103; no. 23
Main Authors Zhu, Pengfei, Chen, Jie, Li, Runze, Chen, Long, Cao, Jianming, Sheng, Zhengming, Zhang, Jie
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 02.12.2013
Subjects
ALUMINIUM
Aluminum
Applied physics
BRAGG CURVE
Decay rate
DIFFUSE SCATTERING
ELECTRONS
EXCITATION
LASERS
MATERIALS SCIENCE
Scattering
TIME RESOLUTION
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Summary:We report ultrafast electron diffuse scattering intensity (DSI) measurement in order to study the structural response of aluminum to femtosecond laser excitation. In this measurement, the evolutions of DSI and Bragg peak intensities after the laser excitation are measured and compared in the time domain. Their differences suggest that two kinds of lattice disorder, short-range and long-range, are triggered simultaneously. The former, induced by electron excitation, arises and decays with a faster rate than the latter which is subject to lattice heating. The results presented show that the time-resolved DSI measurements provide complementary insights to the ultrafast diffraction measurements.
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ISSN:0003-6951
1077-3118
DOI:10.1063/1.4840355