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Nanofocusing radially-polarized beams for high-throughput funneling of optical energy to the near field

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Chen, X.-W., Sandoghdar, V., & Agio, M. (2010). Nanofocusing radially-polarized beams for high-throughput funneling of optical energy to the near field. OPTICS EXPRESS, 18(10), 10878-10887. doi:10.1364/OE.18.010878.


Cite as: http://hdl.handle.net/21.11116/0000-0002-9A2B-1
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. (C)2010 Optical Society of America