Figure | Diversified complex topologial skyrmions from a needle-like GRIN lens. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure | Diversified complex topologial skyrmions from a needle-like GRIN lens.

Caption

(a) Schematics of (a1) the GRIN lens and (a2) the GRIN-lens array, with radial and azimuthal distributions of the fast and slow axes at their cross section, the radius of which can be less than 500 µm, and (a3) a picture of a real GRIN lens. (b),(c) Diverse polarization vectorial light fields corresponding to the different complex photonic quasiparticles generated can be controlled by cascades of GRIN lenses, represented by (b) polarization-ellipse distributions and (c) Stokes-vector distributions, which include (b1),(c1) a skyrmion of topological number of Ns = 2, (b2),(c2) a skyrmionium of Ns = 0, (b3),(c3) a quadruskyrmion of Ns = 4 comprising four elementary skyrmions of Ns = 1, and (b2),(c2) a quadrumeron of Ns =2 comprising four elementary merons of Ns = 1/2.

Credit

by Yijie Shen, Chao He, Zipei Song, Binguo Chen, Honghui He, Yifei Ma, Julian A.J. Fells, Steve J. Elston, Stephen M. Morris, Martin J. Booth, and Andrew Forbes.

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Credit must be given to the creator.

License

CC BY

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