Leakage radiation microscopy of surface plasmons launched by a   nanodiamond-based tip
  Leakage-radiation microscopy of a thin gold film demonstrates the ability of an ensemble of fluorescent diamond nanoparticles attached onto the apex of an optical tip to serve as an efficient near-field surface-plasmon polariton launcher. The implementation of the nanodiamond-based tip in a near-field scanning optical microscope will allow for an accurate control on the launching position, thereby opening the way to scanning plasmonics. 
O. Mollet, A. Cuche, A. Drezet and S. Huant
cond-mat.mes-hall physics.optics