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Observation of radiation pressure exerted by evanescent waves

D. Voigt·B. T. Wolschrijn·R. Jansen·N. Bhattacharya·R. J. C. Spreeuw·H. B. van Linden van den Heuvell
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Abstract

We report a direct observation of radiation pressure, exerted on cold rubidium atoms while bouncing on an evanescent-wave atom mirror. We analyze the radiation pressure by imaging the motion of the atoms after the bounce. The number of absorbed photons is measured for laser detunings ranging from {190 MHz} to {1.4 GHz} and for angles from {0.9 mrad} to {24 mrad} above the critical angle of total internal reflection. Depending on these settings, we find velocity changes parallel with the mirror surface, ranging from 1 to {18 cm/s}. This corresponds to 2 to 31 photon recoils per atom. These results are independent of the evanescent-wave optical power.

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D. Voigt, B. T. Wolschrijn, R. Jansen, N. Bhattacharya, R. J. C. Spreeuw, H. B. van Linden van den Heuvell. 2000-02-10. Observation of radiation pressure exerted by evanescent waves. https://doi.org/10.1103/physreva.61.063412

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