Ultra-thin plasmonic optical vortex plate based on phase discontinuities
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A flat optical device that generates optical vortices with a variety of topological charges is demonstrated. This device spatially modulates light beams over a distance much smaller than the wavelength in the direction of propagation by means of an array of V-shaped plasmonic antennas with sub-wavelength separation. Optical vortices are shown to develop after a sub-wavelength propagation distance from the array, a feature that has major potential implications for integrated optics. © 2012 American Institute of Physics.
author list (cited authors)
Genevet, P., Yu, N., Aieta, F., Lin, J., Kats, M. A., Blanchard, R., ... Capasso, F.