A reflection grating for atoms at normal incidence
Institut d'Optique, URA 14 du CNRS, BP. 147, F-91403 Orsay Cedex, France
Accepted: 22 July 1997
We have observed efficient atomic diffraction at normal incidence on an evanescent standing wave with a very weak spatial modulation. A modulation as small as 1.5% causes 66% of the atoms to be diffracted into the orders . The measured diffraction efficiencies agree quantitatively with a scalar treatment of diffraction in the thin phase grating approximation.
PACS: 32.80.Lg – Mechanical effects of light on atoms, molecules, and ions / 32.80.-t – Photon interactions with atoms / 32.80.Pj – Optical cooling of atoms; trapping
© EDP Sciences, 1997