Transfer of optical vortices in coherently prepared media

Abstract

We consider transfer of optical vortices between laser pulses carrying orbital angular momentum (OAM) in a cloud of cold atoms characterized by the $\Lambda$ configuration of the atom-light coupling. The atoms are initially prepared in a coherent superposition of the lower levels, creating a so-called phaseonium medium. If a single vortex beam initially acts on one transition of the $\Lambda$ scheme, an extra laser beam is subsequently generated with the same vorticity as that of the incident vortex beam. The absorption of the incident probe beam takes place mostly at the beginning of the atomic medium within the absorption length. The losses disappear as the probe beam propagates deeper into the medium where the atoms are transferred to their dark states. The method is extended to a tripod atom-light coupling scheme and a more general $n+1$-level scheme containing $n$ ground states and one excited state, allowing for creating of multiple twisted light beams. We also analyze generation of composite optical vortices in the $\Lambda$ scheme using a superposition of two initial vortex beams and study lossless propagation of such composite vortices.

References in corpus (31)

• Storage of light in atomic vapor
• Stimulated Raman adiabatic passage in physics, chemistry and beyond
• Non-Abelian gauge potentials for ultra-cold atoms with degenerate dark states
• Optical ferris wheel for ultracold atoms
• Highly efficient coherent optical memory based on electromagnetically induced transparency
• Trans-spectral orbital angular momentum transfer via four wave mixing in Rb vapor
• Slow light in degenerate Fermi gases
• Polarization phase gate with a tripod atomic system
• Spatially dependent electromagnetically induced transparency
• Transfer and storage of vortex states in light and matter waves
• Collapses and revivals of stored orbital angular momentum of light in a cold atomic ensemble
• Azimuthal modulation of electromagnetically induced transparency using structured light
• Exchange of optical vortices using an electromagnetically induced transparency based four-wave mixing setup
• Entanglement of the orbital angular momentum states of the photons generated in a hot atomic ensemble
• Transfer of orbital angular momentum of light using two component slow light
• Phase induced transparency mediated structured beam generation in a closed-loop tripod configuration
• Experimental demonstration of spinor slow light
• Slow polaritons with orbital angular momentum in atomic gases
• Polarisation rotation of slow light with orbital angular momentum in ultracold atomic gases
• Linear Up-conversion of Orbital angular momentum
• A Systematic Formulation of Slow Polaritons in Atomic Gases
• New Consequences of Induced Transparency in a Double-Lambda scheme: Destructive Interference In Four-wave Mixing
• Adiabatic pulse propagation in coherent atomic media with the tripod level configuration
• Spinor Slow-Light and Dirac particles with variable mass
• Diffusion induced decoherence of stored optical vortices
• Optical vortices of slow light using tripod scheme
• Electromagnetically induced transparency and nonlinear pulse propagation in a combined tripod and $\Lambda$ atom-light coupling scheme
• Photonic band-gap properties for two-component slow light
• Technique of quantum state transfer for a double Lambda atomic beam
• Topological stability of stored optical vortices
• Nonlinear quantum optics for spinor slow light

Cited by in corpus (8)

• Complete energy conversion between light beams carrying orbital angular momentum using coherent population trapping for a coherently driven double-Λatom-light coupling
• Manipulation and exchange of Light with Orbital Angular Momentum in Quantum Dot Molecules
• Off-axis optical vortices using double-Raman singlet and doublet light-matter schemes
• Four-wave mixing based orbital angular momentum translation
• Two-photon bunching inside a quantum memory cell
• Efficient diffraction control using a tunable active-Raman gain medium
• 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