Split-pulse X-ray photon correlation spectroscopy with seeded X-rays from X-ray laser to study atomic-level dynamics

Yuya Shinohara (), Taito Osaka, Ichiro Inoue, Takuya Iwashita, Wojciech Dmowski, Chae Woo Ryu, Yadu Sarathchandran and Takeshi Egami
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Yuya Shinohara: Materials Science and Technology Division, Oak Ridge National Laboratory
Taito Osaka: RIKEN SPring-8 Center, Sayo
Ichiro Inoue: RIKEN SPring-8 Center, Sayo
Takuya Iwashita: Oita University
Wojciech Dmowski: The University of Tennessee
Chae Woo Ryu: The University of Tennessee
Yadu Sarathchandran: The University of Tennessee
Takeshi Egami: Materials Science and Technology Division, Oak Ridge National Laboratory

Nature Communications, 2020, vol. 11, issue 1, 1-7

Abstract: Abstract With their brilliance and temporal structure, X-ray free-electron laser can unveil atomic-scale details of ultrafast phenomena. Recent progress in split-and-delay optics (SDO), which produces two X-ray pulses with time-delays, offers bright prospects for observing dynamics at the atomic-scale. However, their insufficient pulse energy has limited its application either to phenomena with longer correlation length or to measurement with a fixed delay-time. Here we show that the combination of the SDO and self-seeding of X-rays increases the pulse energy and makes it possible to observe the atomic-scale dynamics in a timescale of picoseconds. We show that the speckle contrast in scattering from water depends on the delay-time as expected. Our results demonstrate the capability of measurement using the SDO with seeded X-rays for resolving the dynamics in temporal and spatial scales that are not accessible by other techniques, opening opportunities for studying the atomic-level dynamics.

Date: 2020
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DOI: 10.1038/s41467-020-20036-z

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