Ultra-thin plasmonic optical vortex plate based on phase discontinuities
- 2 January 2012
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 100 (1), 013101
- https://doi.org/10.1063/1.3673334
Abstract
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.Keywords
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