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Comparing ultrafast surface and bulk heating using time-resolved electron diffraction.

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Title: Comparing ultrafast surface and bulk heating using time-resolved electron diffraction.
Authors: Streubühr, C.1, Kalus, A.1, Zhou, P.1 ping.zhou@uni-due.de, Ligges, M.1,2, Hanisch-Blicharski, A.1,2, Kammler, M.1,3, Bovensiepen, U.1,2, Horn-von Hoegen, M.1,2, von der Linde, D.1
Source: Applied Physics Letters. 4/21/2014, Vol. 104 Issue 16, p1-3. 3p. 1 Diagram, 2 Graphs.
Subject Terms: *ELECTRON diffraction, *PICOSECOND pulses, *HIGH energy electron diffraction, *ENERGY transfer, *VIBRATIONAL spectra, *LASER pulses, *HEATING
Abstract: From measurements of the transient Debye-Waller effect in Bismuth, we determine the buildup time of the random atomic motion resulting from the electronic relaxation after short pulse laser excitation. The surface sensitive reflection high energy electron diffraction and transmission electron diffraction yield a time constant of about 12 ps and 3 ps, respectively. The different energy transfer rates indicate relatively weak coupling between bulk and surface vibrational modes. [ABSTRACT FROM AUTHOR]
Database: Academic Search Index
Description
Abstract:From measurements of the transient Debye-Waller effect in Bismuth, we determine the buildup time of the random atomic motion resulting from the electronic relaxation after short pulse laser excitation. The surface sensitive reflection high energy electron diffraction and transmission electron diffraction yield a time constant of about 12 ps and 3 ps, respectively. The different energy transfer rates indicate relatively weak coupling between bulk and surface vibrational modes. [ABSTRACT FROM AUTHOR]
ISSN:00036951
DOI:10.1063/1.4872055