Transfer of orbital angular momentum of light using two component slow light

Abstract

We study the manipulation of slow light with an orbital angular momentum propagating in a cloud of cold atoms. Atoms are affected by four copropagating control laser beams in a double tripod configuration of the atomic energy levels involved, allowing to minimize the losses at the vortex core of the control beams. In such a situation the atomic medium is transparent for a pair of copropagating probe fields, leading to the creation of two-component (spinor) slow light. We study the interaction between the probe fields when two control beams carry optical vortices of opposite helicity. As a result, a transfer of the optical vortex takes place from the control to the probe fields without switching off and on the control beams. This feature is missing in a single tripod scheme where the optical vortex can be transferred from the control to the probe field only during either the storage or retrieval of light.

References in corpus (36)

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• Stationary pulses of light in an atomic medium
• Non-Abelian gauge potentials for ultra-cold atoms with degenerate dark states
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• Storage and Retrieval of a Squeezed Vacuum
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• Storage and perpendicular retrieving of two-dimensional pulses in electromagnetically induced transparency media
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Cited by in corpus (17)

• Azimuthal modulation of electromagnetically induced transparency using structured light
• Exchange of optical vortices using an electromagnetically induced transparency based four-wave mixing setup
• Transfer of optical vortices in coherently prepared media
• Complete energy conversion between light beams carrying orbital angular momentum using coherent population trapping for a coherently driven double-Λatom-light coupling
• Angular spin-orbit coupling in cold atoms
• Manipulation and exchange of Light with Orbital Angular Momentum in Quantum Dot Molecules
• Experimental demonstration of spinor slow light
• Off-axis optical vortices using double-Raman singlet and doublet light-matter schemes
• Electromagnetically induced transparency and nonlinear pulse propagation in a combined tripod and $\Lambda$ atom-light coupling scheme
• Identifying orbital angular momentum of light in quantum wells
• Spatially strongly confined atomic excitation via two dimensional stimulated Raman adiabatic passage
• Propagation of coupled dark-state polaritons and storage of light in a tripod medium
• Nonlinear quantum optics for spinor slow light
• Analogue of double-$\Lambda$-type atomic medium and vector dromions in a plasmonic metamaterial
• Spin-orbit coupling of optical vector vortices in coherently prepared media
• Propagation of optical vector vortices of slow light in a coherently prepared tripod configuration
• Coherent phase control of orbital-angular-momentum light-induced torque in a double-tripod atom-light coupling scheme