journal article Open Access Mar 01, 2020

Metasurface‐Enabled Generation of Circularly Polarized Single Photons

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Abstract
AbstractSingle photons carrying spin angular momentum (SAM), i.e., circularly polarized single photons generated typically by subjecting a quantum emitter (QE) to a strong magnetic field at low temperatures, are at the core of chiral quantum optics enabling nonreciprocal single‐photon configurations and deterministic spin‐photon interfaces. Here, a conceptually new approach to the room‐temperature generation of SAM‐coded single photons (SSPs) is described, which entails QE nonradiative coupling to surface plasmons being transformed, by interacting with an optical metasurface, into a collimated stream of SSPs with the designed handedness. Design, fabrication, and characterization of SSP sources, consisting of dielectric circular nanoridges with azimuthally varying widths deterministically fabricated on a dielectric‐protected silver film around a nanodiamond containing a nitrogen‐vacancy center, are reported. With properly engineered phases of QE‐originated fields scattered by nanoridges, the outcoupled photons are characterized by a well‐defined SAM (with the chirality >0.8) and high directionality (collection efficiency up to 92%).
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Metrics
128
Citations
45
References
Details
Published
Mar 01, 2020
Vol/Issue
32(16)
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Funding
National Natural Science Foundation of China Award: 51636004
H2020 European Research Council Award: 341054
China Scholarship Council Award: 201806230179
Villum Fonden Award: 00022988
Cite This Article
Yinhui Kan, Sebastian K. H. Andersen, Fei Ding, et al. (2020). Metasurface‐Enabled Generation of Circularly Polarized Single Photons. Advanced Materials, 32(16). https://doi.org/10.1002/adma.201907832
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