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Accelerating Airy beams with particle-like polarization topologies and free-space bimeronic lattices

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Abstract

Phase and polarization singularities in electromagnetic waves are usually attributed to one-dimensional topologies—lines, knots, and braids. Recently, particle-like structures have been predicted and observed: optical Skyrmions, vortices with spherical polarization, etc. In this article, we devise vector Airy beams with point-like singularity in the focal plane, thus leading to the presence of a particle-like topology. We present an extensive analytical analysis of the spatial spectra and focal structure of such beams. We report on the presence of a free-space lattice of bimerons in such vector Airy beams.

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Supplementary Material (5)

NameDescription
Visualization 1       The angular spectrum, of the vector field M and of the vector field N, dependency on the decay parameters.
Visualization 2       Three-dimensional isointensity surfaces, of the transverse electric (M) and transverse magnetic (N) vector Airy beams, dependency on the decay parameters.
Visualization 3       Propagation dynamics of the vector field M and of the vector field N.
Visualization 4       Skyrmionic density distribution of the normal to the polarization ellipse dynamics dependency on the propagation distance.
Visualization 5       Normal to the polarization ellipse vector field dynamics dependency on the propagation distance.

Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Figures (4)

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Equations (8)

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