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We demonstrate a bright and polarized fiber in-line single photon sourcebased on plasmon-enhanced emission of colloidal single quantum dots into anoptical nanofiber. We show that emission properties of single quantum dots canbe strongly enhanced in the presence of single gold nanorods leading to abright and strongly polarized single photon emission. The single photons areefficiently coupled to guided modes of the nanofiber and eventually to a singlemode optical fiber. The brightness (fiber-coupled photon count rate) of thesingle photon source is estimated to be 12.2(0.6) MHz, with high single photonpurity (g2(0) = 0.20(0.04)) and degree of polarization as high as 94-97%. Thepresent device can be integrated into fiber networks paving the way forpotential applications in quantum networks.

Bright and polarized fiber in-line single photon source based on plasmon-enhanced emission into nanofiber guided modes