Abstract

Plasmonic nano-antennas provide broadband spontaneous emission control by confining light on highly sub-wavelength volumes. This property assures efficient coupling and spectral matching of spectrally broad emitters like defects in diamonds or colloidal quantum dots with nanostructures. Precise positioning of emitters inside the nanostructures has been a limitation for efficient coupling and remains a key parameter to control for efficient light nanostructures interaction. In this paper, we propose to optimise the interaction of nanoemittors with antennas by assuring spatial and spectral matching. Although spontaneous emission acceleration ensuring large coupling to the mode has been evidenced in antennas, this property has not been combined with high emission directionnality.

© 2013 IEEE