title: Efficient excitation of surface plasmons in metal nanorods using large longitudinal component of high index nano fibers.
abstract: We report theoretical calculations of the mode fields of high index lead silicate and silicon nano fibers, and show that their strong longitudinal component enables efficient excitation of surface plasmons within a silver nanorod placed at the fiber tip. An excitation efficiency 1600 times higher than that of the standard single mode fibers has been achieved using a 350nm diameter silicon fiber at 1.1μm wavelength, while a factor of 640 times higher efficiency is achieved for a 400nm diameter lead silicate F2 glass fiber. The strong localized field emerging from the end of the rod serves as a nano-scale source with adjustable beam width, and such sources offer a new approach to high-resolution microscopy, particle manipulation and sensing.
authors: Institute for Photonics & Advanced Sensing, School of Chemistry & Physics, The University of Adelaide, North Terrace, Adelaide, Australia. Yinlan.ruan@.adelaide.edu.au
authors: Yinlan
authors: Y
authors: Ruan
authors: Shahraam V
authors: SV
authors: Afshar
authors: Tanya M
authors: TM
authors: Monro
mesh_terms: D008027:Light; D008670:Metals / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*
chemical_list: D008670:Metals