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We demonstrate specular reflection for laser-cooled atoms dropped onto a gradient-light-force mirror. Transit times of 264 msec are observed for atoms dropped from a height of ~2.0 cm and bouncing twice on the evanescent wave before being detected. Of the ~107 atoms initially dropped, ~3 × 103 are detected after 264 msec.
Kasevich et al. (Tue,) studied this question.