Atom trapping and dynamics in the interaction of optical vortices with quadrupole-active transitions

Abstract

Recent studies have confirmed the coupling of optical vortices, such as Laguerre-Gaussian and Bessel-Gaussian modes, to quadrupole-active atomic transitions. This interaction has been shown to be enhanced considerably in the case of Laguerre-Gaussian beams due to the gradient coupling, particularly in the case of a relatively large winding number. Here we consider the trapping and the dynamics of atoms in the optical quadrupole potential generated by two co-axial counter-propagating optical vortex beams. We focus on the atomic transition $6^2{S}_{1/2}\to 5^2{D}_{5/2}$ in Cs which is a dipole-forbidden, but a quadrupole-allowed transition. We show how this atomic transition engages with the optical vortex fields at near-resonance, leading to atom trapping in the optical quadrupole potential well accompanied by translational motion. We show how the optical forces generate the motion of the atoms trapped within the quadrupole potential, illustrating the results using typical experimentally accessible parameters.

7 pages; 9 figures

References in corpus (5)

• Generalized magnetic mirrors
• Atomtronics-enabled Quantum Technologies
• Fiber transport of spatially entangled photons
• Enhancement of the quadrupole interaction of an atom with guided light of an ultrathin optical fiber
• Challenges and constraints of dynamically emerged source and sink in atomtronic circuits: From closed-system to open-system approaches

Cited by in corpus (4)

• Quadrupole absorption rate and orbital angular momentum transfer for atoms in optical vortices
• Quadrupole absorption rate for atoms in circularly-polarized optical vortices
• Optical forces on atoms subject to higher-order Poincaré vortex modes
• Absorption of hybrid fibre modes by Cs atoms in quadrupole transitions