Plasmonic nanostructures offer a wide variety of optical modes that can be harnessed for controlling different radiation properties of single-photon emitters. These effects are broadband and are of special interest for quantum emitters at room temperature. We study these effects using nitrogen-vacancies in diamond nanocrystals. Extremely confined optical modes in hybrid cavity/nanoantenna structures lead to unprecedented levels of single-photon brightness at room temperature in the range of tens of million photons per second. Metamaterials offer highly broadband non-resonant brightness enhancement over 200 nm for all dipole orientations, which can be applied to emitters with broad spectrum or widely inhomogeneous line distributions. Dielectric bullseye corrugations on planar plasmonic films allow to reach highly directional Purcell enhanced emission within 5 degrees half-angle.

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Simeon Bogdanov, Mikhail Y. Shalaginov, Oksana Makarova, Chin-Cheng Chiang, Alexei S. Lagutchev, Alexandra Boltasseva, and Vladimir M. Shalaev, "Room-temperature high-speed control of quantum emitters with plasmonic nanostructures (Conference Presentation)," Proc. SPIE 10734, Quantum Nanophotonics 2018, 107340C (Presented at SPIE Nanoscience + Engineering: August 21, 2018; Published: 18 September 2018); https://doi.org/10.1117/12.2322063.5836440563001.