X-ray speckles from an optical grating

Binhua Lin, Mark L. Schlossman, Mati Meron, Scott M. Williams, Zhengqing Huang, and P. James Viccaro
Phys. Rev. B 58, 8025 – Published 15 September 1998
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Abstract

We report a study of speckles produced by x rays of partial transverse coherence scattered from the surface of an optical reflection grating. This study reveals the presence of surface inhomogeneity that is undetectable with either laser (visible) light or transversely incoherent x rays. Qualitative analysis of the speckle patterns provides us with information on the surface morphology of the optical grating. The underlying order due to the periodicity of the grating enhances the detection of the x-ray speckles. The speckle patterns are obtained using a well-characterized partially transverse-coherent source (a secondary source) produced with an arrangement of slits and a focusing mirror in a synchrotron x-ray beamline. The degree of transverse coherence is measured and compared quantitatively with statistical optics predictions for the complex-coherence factor.

  • Received 20 October 1997

DOI:https://doi.org/10.1103/PhysRevB.58.8025

©1998 American Physical Society

Authors & Affiliations

Binhua Lin

  • The James Franck Institute and The Center for Advanced Radiation Sources, The University of Chicago, Chicago, Illinois 60637

Mark L. Schlossman

  • Department of Physics and Department of Chemistry, The University of Illinois, M/C 273, Chicago, Illinois 60607

Mati Meron

  • The Center for Advanced Radiation Sources, The University of Chicago, Chicago, Illinois 60637

Scott M. Williams

  • Department of Physics, The University of Illinois, M/C 273, Chicago, Illinois 60607

Zhengqing Huang and P. James Viccaro

  • The James Franck Institute and The Center for Advanced Radiation Sources, The University of Chicago, Chicago, Illinois 60637

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Vol. 58, Iss. 12 — 15 September 1998

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