Phys. Rev. Lett.
100,
135502
(2008)
[5 pages]
X-Ray Diffuse Scattering Measurements of Nucleation Dynamics at Femtosecond Resolution
A. M. Lindenberg et al.
Show All Authors/Affiliations
Hide All Authors/Affiliations
A. M. Lindenberg1,2,3, S. Engemann1,3, K. J. Gaffney1,3, K. Sokolowski-Tinten4, J. Larsson5,1, P. B. Hillyard1,6, D. A. Reis7,1, D. M. Fritz1,7, J. Arthur3, R. A. Akre8, M. J. George3, A. Deb1,3, P. H. Bucksbaum1,3, J. Hajdu9,1, D. A. Meyer10,1, M. Nicoul4, C. Blome11, Th. Tschentscher11, A. L. Cavalieri7,12, R. W. Falcone13, S. H. Lee14, R. Pahl15, J. Rudati16, P. H. Fuoss17, A. J. Nelson18, P. Krejcik8, D. P. Siddons19, P. Lorazo20, and J. B. Hastings3
1PULSE Center, Stanford Linear Accelerator Center, Menlo Park, California 94025, USA
2Stanford University, Department of Materials Science and Engineering, Stanford, California 94305, USA
3Stanford Synchrotron Radiation Laboratory/SLAC, Menlo Park, California 94025, USA
4Institut für Experimentelle Physik, Universität Duisberg-Essen, D-45117 Essen, Germany
5Department of Physics, Lund Institute of Technology, P.O. Box 118, S-22100 Lund, Sweden
6Department of Chemistry, Stanford University, Stanford, California 94305, USA
7FOCUS Center, Department of Physics and Applied Physics Program, University of Michigan, Ann Arbor, Michigan 48109, USA
8Stanford Linear Accelerator Center, Menlo Park, California, 94025, USA
9Department of Cell and Molecular Biology, Biomedical Centre, Uppsala University, SE-75124 Uppsala, Sweden
10Stanford University, Department of Chemistry, Stanford, California 94305, USA
11Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
12Max-Planck-Institute of Quantum Optics, Hans-Kopfermann-Str. 1, D-85748, Garching, Germany
13Department of Physics, University of California, Berkeley, California 94720, USA
14Length/Time Metrology Group, Korea Research Institute of Standards and Science, Daejeon 305-600, Republic of Korea
15Consortium for Advanced Radiation Sources, The University of Chicago, Chicago, Illinois 60637, USA
16Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
17Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
18Physics Department, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
19National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973, USA
20Departement de Genie Physique, Ecole Polytechnique de Montreal, C.P. 6079, Succursale Centre-Ville, Montreal (Quebec), Canada H3C 3A7
Received 29 November 2007; published 31 March 2008
Femtosecond time-resolved small and wide angle x-ray diffuse scattering techniques are applied to investigate the ultrafast nucleation processes that occur during the ablation process in semiconducting materials. Following intense optical excitation, a transient liquid state of high compressibility characterized by large-amplitude density fluctuations is observed and the buildup of these fluctuations is measured in real time. Small-angle scattering measurements reveal snapshots of the spontaneous nucleation of nanoscale voids within a metastable liquid and support theoretical predictions of the ablation process.
© 2008 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.135502
DOI:
10.1103/PhysRevLett.100.135502
PACS:
79.20.Ds, 61.05.cp, 61.20.Lc, 64.60.−i
|
|
