Holographic detection of the orbital angular momentum of light with plasmonic photodiodes
Top Cited Papers
- 1 January 2012
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Communications
- Vol. 3 (1), 1278
- https://doi.org/10.1038/ncomms2293
Abstract
Metallic components such as plasmonic gratings and plasmonic lenses are routinely used to convert free-space beams into propagating surface plasmon polaritons and vice versa. This generation of couplers handles relatively simple light beams, such as plane waves or Gaussian beams. Here we present a powerful generalization of this strategy to more complex wavefronts, such as vortex beams that carry orbital angular momentum, also known as topological charge. This approach is based on the principle of holography: the coupler is designed as the interference pattern of the incident vortex beam and focused surface plasmon polaritons. We have integrated these holographic plasmonic interfaces into commercial silicon photodiodes, and demonstrated that such devices can selectively detect the orbital angular momentum of light. This holographic approach is very general and can be used to selectively couple free-space beams into any type of surface wave, such as focused surface plasmon polaritons and plasmonic Airy beams.This publication has 27 references indexed in Scilit:
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