Spin-orbit coupling of optical vector vortices in coherently prepared media

• URL: http://arxiv.org/abs/2511.17406v1
• Date: Fri, 21 Nov 2025 17:06:39 GMT
• Title: Spin-orbit coupling of optical vector vortices in coherently prepared media
• Abstract summary: We investigate the propagation of an optical vector vortex weakly interacting with a coherently prepared atomic medium (phaseonium) in a three-level $$ configuration.<n>The vector beam consists of vortex pulse pairs with right- and left-circular polarizations, corresponding to opposite spin angular momentum (SAM)<n>We show that during the propagation of the vortex pairs, the medium inherits the topology of the vortex pair, mapping the OAM onto a spatially structured atomic coherence.<n>This mapping produces $2|l|-$fold azimuthal transparency structures that reshape the beam intensity from a ring into a petal-like pattern.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We investigate the propagation of an optical vector vortex weakly interacting with a coherently prepared atomic medium (phaseonium) in a three-level $Λ$ configuration. The vector beam consists of vortex pulse pairs with right- and left-circular polarizations, corresponding to opposite spin angular momentum (SAM), and carrying opposite orbital angular momentum (OAM) charges $\pm l$. We show that during the propagation of the vortex pairs, analytically obtained in the linear regime, the medium inherits the topology of the vortex pair, mapping the OAM onto a spatially structured atomic coherence. This mapping produces $2|l|-$fold azimuthal transparency structures that reshape the beam intensity from a ring into a petal-like pattern. The OAM-structured atomic coherence induces a corresponding optical anisotropy within the medium, which feeds back into the propagating vector beam, resulting in optical spin-orbit coupling manifested as SAM exchange, rotation, and evolution of polarization textures. Depending on the initial ground-state population of the phaseonium, the polarization state evolves between left-circular, linear, and right-circular polarizations.

Related papers

• Chiral rotational dynamics in the molecular frame: Breaking symmetry with angular momentum [42.198437315230265]
  Achiral molecules can be prepared in superposition states that are chiral.<n>We propose angular momentum orientation in the molecular frame to achieve the required symmetry breaking.
  arXiv  Detail & Related papers  (2026-08-18T08:06:57Z)
• Fringe field induced spin-OAM mixing of twisted electrons [0.0]
  We study spin effects in twisted-electron propagation through the entrance or exit region of an axially symmetric magnetic coil.<n>We derive a paraxial spinor equation in which the longitudinally varying solenoidal field produces, in addition to the usual diagonal Zeeman term, a transverse Pauli coupling proportional to the fringe-field gradient.<n>We derive the corresponding transition amplitudes and show how their phases are governed jointly by the Ermakov accumulation and the diagonal spin-orbital rotation.
  arXiv  Detail & Related papers  (2026-07-03T06:36:16Z)
• Exact Helicity-Orbital Coupled Dynamics in Chiral Media: An Optical Dirac Framework for Photonic Rabi Oscillations [0.0]
  We show that light propagation in reciprocal chiral photonic media admits a unified description in terms of an emergent Dirac structure in helicity space.<n>Our work establishes an optical Dirac framework for structured light in chiral media.
  arXiv  Detail & Related papers  (2026-06-29T13:37:02Z)
• Quadratic Quantum Polarimetry with Entangled Photon Pairs [31.84289776601848]
  We introduce a two-photon probing approach in which both photons of an entangled pair interact with the same depolarizing medium simultaneously.<n>We show that depolarization induces degradation of entanglement and state purity.<n>These results establish two-photon probing as a higher-order quantum polarimetric modality for characterizing polarization channels.
  arXiv  Detail & Related papers  (2026-04-10T12:17:06Z)
• Propagation of optical vector vortices of slow light in a coherently prepared tripod configuration [0.0]
  We investigate the propagation of optical vector vortices of slow light in a coherently prepared four-level tripod atomic system.<n>The vortex OAM is mapped onto the medium, producing symmetrical azimuthally structured absorption patterns.<n>The rate of polarization transitions is tunable via the control field strength, demonstrating flexible control over slow-light vector vortex dynamics.
  arXiv  Detail & Related papers  (2026-03-24T11:45:41Z)
• Tunable dual-band atomic mirror based on subwavelength atomic arrays under electromagnetically induced transparency [34.31439757261399]
  Sub atomic arrays offer a powerful platform for engineering cooperative light-matter interactions and enabling quantum metasurfaces.<n>We demonstrate that a two-dimensional array of three-level atoms operating under electromagnetically induced transparency can function as a tunable dual-band atomic mirror.
  arXiv  Detail & Related papers  (2025-11-28T09:54:20Z)
• Characterization of Polariton Dynamics in a Multimode Cavity (II): Coherent-Incoherent Transition Driven by Photon Loss [0.0]
  We explore the non-Hermitian polariton dynamics within a decay- tunable multimode cavity model.<n>The complex eigen-spectrum of the model Hamiltonian allows us to predict the incoherent-coherent transition induced by photon losses.<n>The resulting dispersion relation, group velocity, and relaxation rate exhibit striking signatures.
  arXiv  Detail & Related papers  (2025-07-25T20:52:25Z)
• Spin-dependent routing of optical beams in the bulk of twisted anisotropic media [39.58317527488534]
  We discuss a new kind of photonic spin-Hall effect (PSHE) for optical beams propagating inside an inhomogeneously twisted anisotropic material.<n>The rotation angle plays the role of an effective gauge field.<n>When the twisting distribution is odd symmetric, the optical beams move along mirror-symmetric trajectories according to their helicity.
  arXiv  Detail & Related papers  (2025-07-07T12:29:08Z)
• Multiband dispersion and warped vortices of strongly-interacting photons [36.939655407596426]
  We study quantum correlations between interacting photons realized through co-propagating Rydberg polaritons.<n>For three photons, the dispersion breaks the symmetry between a photon pair propagating ahead versus behind a single photon.
  arXiv  Detail & Related papers  (2025-02-17T08:35:10Z)
• Induced Berry Connection and Photonic Spin Hall Effect in Optical Dirac Theory [0.0]
  We present a field-theoretical model of spin-orbit interaction and photonic spin/orbit Hall effects.<n>Our approach reformulates light propagation along helical paths as solving the Maxwell equations in a ray-based curvilinear coordinate system.<n>We find that the transverse spin of evanescent waves couples with EOAM, revealing that the geometric phase of elliptically polarized light differs from that of circularly polarized light.
  arXiv  Detail & Related papers  (2025-02-03T03:19:56Z)
• Correlated relaxation and emerging entanglement in arrays of $Λ$-type atoms [83.88591755871734]
  We show that the atomic entanglement emerges in the course of relaxation and persists in the final steady state of the system. Our findings open a new way to engineer dissipation-induced entanglement.
  arXiv  Detail & Related papers  (2024-11-11T08:39:32Z)
• Geometric Phases in Optics: Polarization of Light Propagating in Helical Optical Fibers [0.0]
  The geometric phase in optics (GPIO) is directly associated with the polarization of light. We investigate the physical principles underlying the occurrence of the for a single-mode light beam propagating in a single-mode optical fiber wound into a circular helix configuration.
  arXiv  Detail & Related papers  (2024-07-28T08:24:07Z)
• Collective rovibronic dynamics of a diatomic gas coupled by cavity [0.0]
  We consider an ensemble of homonuclear diatomic molecules coupled to the two polarization directions of a Fabry-P'erot cavity. We identify a coupling mechanism mediated simultaneously by the two perpendicular polarizations, and inducing polaritonic relaxation towards molecular rotations. Our simulations indicate that the molecular rotational dynamics in gas-phase cavity-coupled systems can serve as a novel probe for non-radiative polaritonic decay towards the dark-states manifold.
  arXiv  Detail & Related papers  (2024-01-19T14:35:35Z)
• Trapped atoms in spatially-structured vector light fields [32.97208255533144]
  We present a framework for computing atomic transition matrix elements for light fields of arbitrary spatial mode and polarization structures. We calculate the spatial dependence of electronic and motional matrix elements for tightly focused Hermite-Gaussian, Laguerre-Gaussian and for radially and azimuthally polarized beams. We show that near the diffraction limit, all these beams exhibit longitudinal fields and field gradients, which strongly affect the selection rules and could be used to tailor the light-matter interaction.
  arXiv  Detail & Related papers  (2023-06-30T11:47:34Z)
• Theory for Coulomb scattering of trions in 2D materials [19.444636864515726]
  We develop a theoretical description of Coulomb interactions between trions (charged excitons) that define a nonlinear optical response in doped two-dimensional semiconductors. We find that the considered scattering gives significant contribution to the optical nonlinearity in monolayers of transition metal dichalcogenides.
  arXiv  Detail & Related papers  (2022-07-06T13:27:40Z)
• Twisted-light-induced exciton wave packets in transition-metal dichalcogenide monolayers [1.189955933770711]
  We show that the photo-excitation of TL incident to a TMD-ML leads to the formation of spatially localized exciton wave packets. The application of linearly polarized TL onto a valley-excitonic system mimics an exciton multiplexer allowing for selectively detecting the individual valley-mixed exciton bands.
  arXiv  Detail & Related papers  (2022-03-04T01:03:11Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.