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  • Title: Nanofocusing radially-polarized beams for high-throughput funneling of optical energy to the near field.
    Author: Chen XW, Sandoghdar V, Agio M.
    Journal: Opt Express; 2010 May 10; 18(10):10878-87. PubMed ID: 20588943.
    Abstract:
    We theoretically show that a weakly-focused radially polarized beam can excite surface-plasmon-polaritons in metal nanowires and nanocones with efficiencies of the order of 90% and large bandwidths. The coupling mechanism relies on the formation of a standing wave on the nanowire facet, which imposes a relationship between the operating wavelength and the nanowire radius. An immediate application of this finding is nanofocusing of optical energy for implementations of ultra-fast and high-throughput linear and nonlinear nanoscopies, optical nanolithographies, quantum nano-optics and photochemistry at the nanoscale.
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