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

Year: 2010

Authors: Chen X.W., Sandoghdar V., Agio M.

Autors Affiliation: Swiss Fed Inst Technol, Phys Chem Lab, CH-8093 Zurich, Switzerland.

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.

Journal/Review: OPTICS EXPRESS

Volume: 18 (10)      Pages from: 10878  to: 10887

More Information: We thank F. De Angelis, E. Di Fabrizio, M. Celebrano, K.-G. Lee and S. Gotzinger for helpful conversations. This work was supported by ETH Zurich grant TH-49/06-1.
KeyWords: Surface-plasmons; Light; Microscopy; Tip; Fluorescence; Excitation; Probes; Waves; Size
DOI: 10.1364/OE.18.010878

Citations: 35
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