Direct observation of surface-trapped diffracted waves

Terrence Jach*, D. B. Novotny, M. J. Bedzyk, Qun Shen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


We have made the first direct observation of a diffracted x-ray beam that occurs only at an interface in the grazing-angle diffraction geometry. The beam, which is unable to propagate into the bulk of either component of the interface, was detected at the surface of a Ge crystal. A roughened area etched into the surface permitted phase matching to a beam in the vacuum. The diffracted beam that is observed to escape in this configuration shows a wave-vector dependence that cannot be qualitatively explained by purely kinematic models of scattering from rough surfaces.

Original languageEnglish (US)
Pages (from-to)5557-5560
Number of pages4
JournalPhysical Review B
Issue number8
StatePublished - 1989

ASJC Scopus subject areas

  • Condensed Matter Physics


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