Confinement of ultracold atoms in a Laguerre-Gaussian laser beam created with diffractive optics

OPTICS COMMUNICATIONS

卷:321

Article

Kennedy, Sharon A.¹  Biedermann, G. W.¹  Farrar, J. T.¹  Akin, T. G.¹  Krzyzewski, S. P.¹  Abraham, E. R. I.¹ 

[1] Univ Oklahoma, Homer L Dodge Dept Phys & Astron, Norman, OK 73019 USA

关键词: Laguerre-Gaussian mode;    Toroid trap;    Multiply-connected trap;    Atom trap;    Diffractive optics;   

DOI  :  10.1016/j.optcom.2014.01.084

来源: Elsevier

【 摘 要 】

We report 2D confinement of Rb-87 atoms in a Laguerre-Gaussian laser beam. Changing of the sign of the detuning from the atomic resonance dramatically alters the geometry of the confinement. With the laser detuned to the blue, the atoms are confined to the dark, central node of the Laguerre-Gaussian laser mode. This trapping method leads to low ac Stark shifts to the atomic levels. Alternatively, by detuning the laser to the red of the resonance, we confine atoms to the high intensity outer ring in a multiply-connected, toroidal configuration. We model the confined atoms to determine azimuthal intensity variations of the trapping laser, caused by slight misalignments of the Laguerre-Gaussian mode generating optics. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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