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Recent developments in the field of metamaterials have revealed unparalleled opportunities for "tailoring" space for light propagation, opening a new paradigm in spin- and quantum-related phenomena in optical physics. We show that unique optical properties of metamaterials open unlimited prospects to "tailor" light itself.
We experimentally demonstrate that an array of subwavelength channels with a spiral size distribution milled in a metal film can be used to manipulate the phase front of light beam and produce a vortex beam.
We demonstrate generation and propagation of an optical vortex using a metasurface fabricated directly on the cross-section of a few-mode optical fiber at visible wavelengths. The experimental results are in good agreement with numerical simulations.
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