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Journal Articles Physical Review Letters Year : 2018

Observation of Extra Photon Recoil in a Distorted Optical Field

Abstract

Light carries momentum which induces on atoms a recoil for each photon absorbed. In vacuum, for a monochromatic beam of frequency ν, the global momentum per photon is bounded by general principles and is smaller than hν/c leading to a limit on the recoil. However, locally this limit can be broken. In this paper, we give a general formula to calculate the recoil in vacuum. We show that in a laser beam with a distorted optical field, there are regions where the recoil can be higher than this limit. Using atoms placed in those regions we are able to measure directly the extra recoil.

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Dates and versions

hal-02048174 , version 1 (25-02-2019)

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Satyanarayana Bade, Lionel Djadaojee, Manuel Andia, Pierre Cladé, Saïda Guellati-Khélifa. Observation of Extra Photon Recoil in a Distorted Optical Field. Physical Review Letters, 2018, 121 (7), pp.073603 (2018). ⟨10.1103/PhysRevLett.121.073603⟩. ⟨hal-02048174⟩
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