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Parametric Down-Conversion of X Rays into the Optical Regime

DOI: 10.1103/PhysRevLett.119.253902 DOI Help

Authors: A. Schori (Bar Ilan University) , C. Bömer (European XFEL) , D. Borodin (Bar Ilan University) , S. P. Collins (Diamond Light Source) , B. Detlefs (European Synchrotron Radiation Facility) , M. Moretti Sala (European Synchrotron Radiation Facility) , S. Yudovich (Bar Ilan University) , S. Shwartz (Bar Ilan University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Letters , VOL 119

State: Published (Approved)
Published: December 2017
Diamond Proposal Number(s): 14646

Abstract: We report the observation of parametrically down-converted x-ray signal photons at photon energies that correspond to idler photons at optical wavelengths. The count-rate dependence on the angles of the input beam and of the detector and on the slit sizes agrees with theory within the experimental uncertainties. The nonlinear susceptibility, which we calculated from the measured efficiencies, is comparable to the nonlinear susceptibility evaluated from the measurements of x-ray and optical wave mixing. The results of the present Letter advance the development of a spectroscopy method for probing valence-electron charges and the microscopic optical response of crystals with atomic-scale resolution.

Journal Keywords: Parametric Down-Conversion

Subject Areas: Physics

Instruments: I16-Materials and Magnetism

Other Facilities: ESRF