title: Time-resolved coherent X-ray diffraction imaging of surface acoustic waves.
abstract: Time-resolved coherent X-ray diffraction experiments of standing surface acoustic waves, illuminated under grazing incidence by a nanofocused synchrotron beam, are reported. The data have been recorded in stroboscopic mode at controlled and varied phase between the acoustic frequency generator and the synchrotron bunch train. At each time delay (phase angle), the coherent far-field diffraction pattern in the small-angle regime is inverted by an iterative algorithm to yield the local instantaneous surface height profile along the optical axis. The results show that periodic nanoscale dynamics can be imaged at high temporal resolution in the range of 50 ps (pulse length).
authors.affiliation: Institut für Röntgenphysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
authors.forename: Jan-David
authors.initials: JD
authors.lastname: Nicolas
authors.affiliation: Institut für Röntgenphysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
authors.forename: Tobias
authors.initials: T
authors.lastname: Reusch
authors.affiliation: Institut für Röntgenphysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
authors.forename: Markus
authors.initials: M
authors.lastname: Osterhoff
authors.affiliation: Deutsches Elektronen-Synchrotron, Notkestrasse 85, 22605 Hamburg, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Sprung
authors.affiliation: Lehrstuhl für Experimentalphysik I, Universitätsstrasse 1, 86159 Augsburg, Germany ; Nanosystems Initiative Munich (NIM), Schellingstrasse 4, 80799 München, Germany.
authors.forename: Florian J R
authors.initials: FJ
authors.lastname: Schülein
authors.affiliation: Lehrstuhl für Experimentalphysik I, Universitätsstrasse 1, 86159 Augsburg, Germany ; Nanosystems Initiative Munich (NIM), Schellingstrasse 4, 80799 München, Germany.
authors.forename: Hubert J
authors.initials: HJ
authors.lastname: Krenner
authors.affiliation: Lehrstuhl für Experimentalphysik I, Universitätsstrasse 1, 86159 Augsburg, Germany ; Nanosystems Initiative Munich (NIM), Schellingstrasse 4, 80799 München, Germany.
authors.forename: Achim
authors.initials: A
authors.lastname: Wixforth
authors.affiliation: Institut für Röntgenphysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
authors.forename: Tim
authors.initials: T
authors.lastname: Salditt
keywords: coherent X-ray diffraction imaging; nanostructure; surface acoustic waves