Measurements of polarization dependencies in parametric down-conversion of x rays into ultraviolet radiation

S. Sofer, O. Sefi, A. G.A. Nisbet, S. Shwartz

Research output: Contribution to journalArticlepeer-review

Abstract

We present measurements of the polarization dependencies of the X-ray signal photons generated by the effect of parametric down-conversion of x rays into ultraviolet radiation. The results exhibit pronounced discrepancies with the classical model for the nonlinearity but qualitatively agree with a recently developed quantum mechanical theory for the nonlinear interaction. Our work shows that the reconstruction of the atomic scale charge distribution of valence electrons in crystals by using nonlinear interaction between x rays and longer wavelength radiation, as was suggested in previous works, requires the knowledge of polarization of the generated X-ray signal beam. The results presented in this work indicate a methodology for the study of properties of the Wannier functions in crystals.

Original languageEnglish
Article number085207
JournalPhysical Review B
Volume104
Issue number8
DOIs
StatePublished - 15 Aug 2021

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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