Atoms in axially shifted tightly focused counter-propagating beams: The role of the Gouy and curvature phases

K. Koksal; V. E. Lembessis; J. Yuan; M. Babiker

doi:10.1364/JOSAB.396097

Atoms in axially shifted tightly focused counter-propagating beams: The role of the Gouy and curvature phases

K. Koksal^*, V. E. Lembessis, J. Yuan, M. Babiker

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We consider the interaction of atoms with two tightly focused and axially shifted counter-propagating optical beams. At sub-wavelength focusing, we find that the scattering force potential in the three-dimensional space between the shifted focal planes changes from a feature with a saddle-point to a three-dimensional trapping potential. Further analysis shows that due to the tight focusing, the trapping depends on significant contributions arising from the Gouy and curvature phase gradients of the interfering beams. The physics and its effects are illustrated with reference to the sub-wavelength trapping of sodium atoms.

Original language	English
Pages (from-to)	2570-2577
Number of pages	8
Journal	Journal of the Optical Society of America B: Optical Physics
Volume	37
Issue number	9
DOIs	https://doi.org/10.1364/JOSAB.396097
Publication status	Published - 1 Jan 2020

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© 2020 The Optical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

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Atoms in axially shifted tightly focused counter-propagating beams: The role of the Gouy and curvature phases

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