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Journal Article

Emerging Beam Resonances in Atom Diffraction from a Reflection Grating

MPS-Authors
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Zhao,  Bum Suk
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Meijer,  Gerard
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Schöllkopf,  Wieland
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Fulltext (public)

e240404.pdf
(Publisher version), 376KB

1005.3467v1.pdf
(Preprint), 324KB

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Citation

Zhao, B. S., Meijer, G., & Schöllkopf, W. (2010). Emerging Beam Resonances in Atom Diffraction from a Reflection Grating. Physical Review Letters, 104, 240404-1-4. doi:10.1103/PhysRevLett.104.240404.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-F57F-4
Abstract
We report on the observation of emerging beam resonances, well known as Rayleigh-Wood anomalies and threshold resonances in photon and electron diffraction, respectively, in an atom-optical diffraction experiment. Diffraction of He atom beams reflected from a blazed ruled grating at grazing incidence has been investigated. The total reflectivity of the grating as well as the intensities of the diffracted beams reveal anomalies at the Rayleigh angles of incidence, i.e., when another diffracted beam emerges parallel to the grating surface. The observed anomalies are discussed in terms of the classical wave-optical model of Rayleigh and Fano.