Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 119, Issue 12, Pages -Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.2119616119
Keywords
X-rays sciences; frequency combs; interferometry
Categories
Funding
- Department of Energy (DOE), Laboratory Directed Research and Development Program at SLAC National Accelerator Laboratory [DE-AC02-76SF00515]
- Ruth L. Kirschstein National Research Service Award [F32GM116423]
- Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences of the DOE [DE-AC02-76F00515, DE-AC0205CH11231]
- NIH [GM126289, GM110501, GM055302]
- JPSJ KAKENHI [19K20604]
- DOE Office of Biological and Environmental Research
- NIH National Institute of General Medical Sciences (NIGMS) [P41GM103393]
- Grants-in-Aid for Scientific Research [19K20604] Funding Source: KAKEN
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Coherent nonlinear spectroscopies and imaging in the X-ray domain provide direct insight into the coupled motions of electrons and nuclei with resolution on the electronic length scale and timescale. The experimental realization of such techniques will strongly benefit from access to intense, coherent pairs of femtosecond X-ray pulses. We have observed phase-stable X-ray pulse pairs containing more than 3 x 107 photons at 5.9 keV (2.1 angstrom) with similar to 1 fs duration and 2 to 5 fs separation. The highly directional pulse pairs are manifested by interference fringes in the superfluorescent and seeded stimulated manganese K alpha emission induced by an X-ray free-electron laser. The fringes constitute the time-frequency X-ray analog of Young's double-slit interference, allowing for frequency domain X-ray measurements with attosecond time resolution.
Coherent nonlinear spectroscopies and imaging in the X-ray domain provide direct insight into the coupled motions of electrons and nuclei with resolution on the electronic length scale and timescale. The experimental realization of such techniques will strongly benefit from access to intense, coherent pairs of femtosecond X-ray pulses. We have observed phase-stable X-ray pulse pairs containing more than 3 x 107 photons at 5.9 keV (2.1 angstrom) with similar to 1 fs duration and 2 to 5 fs separation. The highly directional pulse pairs are manifested by interference fringes in the superfluorescent and seeded stimulated manganese K alpha emission induced by an X-ray free-electron laser. The fringes constitute the time-frequency X-ray analog of Young's double-slit interference, allowing for frequency domain X-ray measurements with attosecond time resolution.
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