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Phase-dependent polarization aspects of three-wave X-ray diffraction: an iterative Born approximation.

Yuri P Stetsko1, Yen-Ru Lee, Mau-Tsu Tang

  • 1National Synchrotron Radiation Research Center, and Department of Physics, National Tsing Hua University, Hsinchu, 300 Taiwan. stetsko@nsrcc.org.tw

Acta Crystallographica. Section A, Foundations of Crystallography
|December 24, 2003
PubMed
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The iterative Born approximation accurately models X-ray diffraction, revealing phase sensitivity and profile asymmetry. This method predicts a novel intensity profile reversal with phase changes in three-wave dynamical X-ray diffraction.

Area of Science:

  • Condensed Matter Physics
  • Crystallography
  • X-ray Optics

Background:

  • Dynamical X-ray diffraction is crucial for analyzing crystal structures.
  • Understanding wave interactions in multi-beam diffraction is complex.
  • Polarization effects significantly influence diffraction patterns.

Purpose of the Study:

  • To derive and apply the iterative Born approximation for three-wave dynamical X-ray diffraction.
  • To investigate the impact of incident wave polarization on diffraction profiles.
  • To analyze phase sensitivity and asymmetry in diffraction patterns.

Main Methods:

  • Derivation of the iterative Born approximation for three-wave diffraction.
  • Theoretical analysis of polarization dependence.

Related Experiment Videos

  • Experimental investigation of diffraction profiles.
  • Comparison with exact dynamical calculations.

    • Main Results:

    • The iterative Born approximation shows good qualitative agreement with exact dynamical calculations.
    • General conditions for phase sensitivity and profile asymmetry were determined.
    • The dependence of diffraction profiles on incident wave polarization was clarified.
    • A new phenomenon of reversing asymmetry with phase change was predicted.

    Conclusions:

    • The iterative Born approximation provides a valid and efficient method for studying three-wave X-ray diffraction.
    • Polarization state is a critical factor influencing X-ray diffraction profiles.
    • The study advances the understanding of phase-dependent phenomena in X-ray diffraction.