Fluorescence enhancement by a dark plasmon mode

  title={Fluorescence enhancement by a dark plasmon mode},
  author={Manuela Peter and Julia F. M. Werra and Cody Friesen and Doreen Achnitz and Kurt Busch and Stefan Linden},
  journal={Applied Physics B},
We investigate the fluorescence properties of colloidal quantum dots coupled to gold nanowire antennas. By varying the wire length, the plasmon modes of the nanoantennas are successively tuned through the emission band of the quantum dots. We observe a pronounced fluorescence enhancement both for short and long nanoantennas. These findings can be attributed to the coupling of the quantum dots to the bright dipole plasmon mode and the dark quadrupol plasmon mode, respectively. This… 
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