Azimuthal modulation of electromagnetically induced transparency using structured light

Abstract

Recently a scheme has been proposed for detection of the structured light by measuring the transmission of a vortex beam through a cloud of cold rubidium atoms with energy levels of the $\Lambda$-type configuration {[}N. Radwell et al., Phys. Rev. Lett. 114, 123603 (2015){]}. This enables observation of regions of spatially dependent electromagnetically induced transparency (EIT). Here we suggest another scenario for detection of the structured light by measuring the absorption profile of a weak nonvortex probe beam in a highly resonant five-level combined tripod and $\Lambda$ (CTL) atom-light coupling setup. We demonstrate that due to the closed-loop structure of CTL scheme, the absorption of the probe beam depends on the azimuthal angle and orbital angular momentum (OAM) of the control vortex beams. This feature is missing in simple $\Lambda$ or tripod schemes, as there is no loop in such atom-light couplings. One can identify different regions of spatially structured transparency through measuring the absorption of probe field under different configurations of structured control light.

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Cited by in corpus (13)

• Vectorial light-matter interaction -- exploring spatially structured complex light fields
• An atomic compass -- detecting 3D magnetic field alignment with vector vortex light
• 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
• Manipulation and exchange of Light with Orbital Angular Momentum in Quantum Dot Molecules
• Spatial Kramers-Kronig relation and controlled unidirectional reflection in cold atoms
• Off-axis optical vortices using double-Raman singlet and doublet light-matter schemes
• Identifying orbital angular momentum of light in quantum wells
• Transfer and evolution of structured polarization in a double-V atomic system
• Coherent control of photonic spin Hall effect in a Cavity
• 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