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- W2768396837 abstract "In this work, a new plasmonic bulls-eye structure is introduced to efficiently harvest the emitted light from diamond nitrogen vacancy (NV) centers. We show that the presence of a simple metal sub-layer underneath of a conventional bulls-eye antenna, separated by a dielectric layer, results in the spontaneous emission enhancement and increment in out-coupled light intensity. High Purcell factor is accessible in such a structure, which consequently boosts efficiency of the radiated light intensity from the structure. The structure shows considerable enhancement in far-field intensity, about three times higher than that of a one-side corrugated (conventional) optimized structure. In addition, we study for the first time asymmetric structures to steer emitted beams in two-axis. Our results show that spatial off-axial steering over a cone is approachable by introducing optimal asymmetries to grooves and ridges of the structure. The steered light retains a level of intensity even higher than conventional symmetric structures. A high value of directivity of 16 for off-axis steering is reported." @default.
- W2768396837 created "2017-12-04" @default.
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- W2768396837 date "2017-11-27" @default.
- W2768396837 modified "2023-10-18" @default.
- W2768396837 title "Bright off-axis directional emission with plasmonic corrugations" @default.
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- W2768396837 doi "https://doi.org/10.1364/oe.25.030827" @default.
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