The polarization singularities are directly generated by using plasmonic metasurfaces with the geometric phase profiles designed to form the Poincaré beams. Different morphologies of polarization topological structures of lemon, star, monstar, spiral, dipole and quadrupole are created by the superpositions of Laguerre-Gauss modes with different orders under orthogonal circular or linear polarization basis. The polarization ellipse patterns and topological features of the produced optical vector fields are analyzed to reveal the properties of the polarization singularities of C-points and L-lines, and the orbital angular momentum states are also measured. The demonstrated polarization singularities generated from the geometric metasurfaces will promise many potential applications related to optical polarization imaging, metrology, optical trapping and quantum information processing.
Y. Zhang et al., "Generation of Polarization Singularities with Geometric Metasurfaces," Scientific Reports, vol. 9, no. 1, Nature Research, Dec 2019.
The definitive version is available at https://doi.org/10.1038/s41598-019-56179-3
Mechanical and Aerospace Engineering
Intelligent Systems Center
International Standard Serial Number (ISSN)
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01 Dec 2019