Nathan P. Malcolm, Department of Mechanical Engineering, University of Texas at Austin; A. Heltzel, PC Krause and Associates, Inc; Konstantin V. Sokolov, Department of Biomedical Engineering, University of Texas M.D. Anderson Cancer Center; Li Shi and John R. Howell, Department of Mechanical Engineering, University of Texas at Austin
Finite difference time domain simulation reveals plasmonic coupling and local field enhancement at the gap between the gold nanoparticle _NP_ tip of a ZnO nanowire _NW_ waveguide and a gold-coated substrate or a gold NP probe. The region of field enhancement is about three times smaller than the 100 nm diameter of the gold NP tip, making the NW waveguide grown on a transparent microcantilever well-suited for near field imaging of single molecules immobilized on a gold substrate or gold NP-labeled cell membranes with superior spatial resolution and signal to noise ratio.
2008 American Institute of Physics. _DOI: 10.1063/1.3013816_