Plasmonic-based techniques to generate and detect optical vortex beams
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Ultra-thin and integrated photonic devices based on optical phase discontinuities can generate optical vortices with a variety of topological charges, as well as sort out vortex beam topological charges by means of holographic gratings. ©2012 Optical Society of America.
author list (cited authors)
Genevet, P., Lin, J., Yu, N., Aieta, F., Kats, M. A., Blanchard, R., ... Capasso, F.