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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 13 — Jun. 20, 2011
  • pp: 12180–12189

Pressure-assisted melt-filling and optical characterization of Au nano-wires in microstructured fibers

H. W. Lee, M. A. Schmidt, R. F. Russell, N. Y. Joly, H. K. Tyagi, P. Uebel, and P. St. J. Russell  »View Author Affiliations

Optics Express, Vol. 19, Issue 13, pp. 12180-12189 (2011)

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We report a novel splicing-based pressure-assisted melt-filling technique for creating metallic nanowires in hollow channels in microstructured silica fibers. Wires with diameters as small as 120 nm (typical aspect ration 50:1) could be realized at a filling pressure of 300 bar. As an example we investigate a conventional single-mode step-index fiber with a parallel gold nanowire (wire diameter 510 nm) running next to the core. Optical transmission spectra show dips at wavelengths where guided surface plasmon modes on the nanowire phase match to the glass core mode. By monitoring the side-scattered light at narrow breaks in the nanowire, the loss could be estimated. Values as low as 0.7 dB/mm were measured at resonance, corresponding to those of an ultra-long-range eigenmode of the glass-core/nanowire system. By thermal treatment the hollow channel could be collapsed controllably, permitting creation of a conical gold nanowire, the optical properties of which could be monitored by side-scattering. The reproducibility of the technique and the high optical quality of the wires suggest applications in fields such as nonlinear plasmonics, near-field scanning optical microscope tips, cylindrical polarizers, optical sensing and telecommunications.

© 2011 OSA

OCIS Codes
(230.4000) Optical devices : Microstructure fabrication
(240.6680) Optics at surfaces : Surface plasmons
(290.0290) Scattering : Scattering
(060.4005) Fiber optics and optical communications : Microstructured fibers
(160.4236) Materials : Nanomaterials

ToC Category:
Optics at Surfaces

Original Manuscript: May 3, 2011
Revised Manuscript: May 31, 2011
Manuscript Accepted: June 1, 2011
Published: June 8, 2011

H. W. Lee, M. A. Schmidt, R. F. Russell, N. Y. Joly, H. K. Tyagi, P. Uebel, and P. St. J. Russell, "Pressure-assisted melt-filling and optical characterization of Au nano-wires in microstructured fibers," Opt. Express 19, 12180-12189 (2011)

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