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Broadband enhancement of spontaneous emission from nitrogen-vacancy centers in nanodiamonds by hyperbolic metamaterials M.Y.Shalaginov, S.Ishii, J.Liu, J.Liu, J.Irudayaraj, A.Lagutchev, A.V.Kildishev, V.M.Shalaev Abstract: We experimentally demonstrate a broadband enhancement of emission from nitrogen-vacancy centers in nanodiamonds. The enhancement is achieved by using a multilayer metamaterial with hyperbolic dispersion. The metamaterial is fabricated as a stack of alternating gold and alumina layers. Our approach paves the way towards the construction of efficient single-photon sources as planar on-chip devices. doi:10.1063/1.4804262 |