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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 12 — Jun. 16, 2014
  • pp: 14148–14154

Near-field observation of light propagation in nanocoax waveguides

Juan M. Merlo, Fan Ye, Binod Rizal, Michael J. Burns, and Michael J. Naughton  »View Author Affiliations

Optics Express, Vol. 22, Issue 12, pp. 14148-14154 (2014)

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We report the observation of propagating modes of visible and near infrared light in nanoscale coaxial (metal-dielectric-metal) structures, using near-field scanning optical microscopy. Together with numerical calculations, we show that the propagated modes have different nature depending on the excitation wavelength, i.e., plasmonic TE11 and TE21 modes in the near infrared and photonic TE31, TE41 and TM11 modes in the visible. Far field transmission out of the nanocoaxes is dominated by the superposition of Fabry-Perot cavity modes resonating in the structures, consistent with theory. Such coaxial optical waveguides may be useful for future nanoscale photonic systems.

© 2014 Optical Society of America

OCIS Codes
(180.0180) Microscopy : Microscopy
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Integrated Optics

Original Manuscript: April 25, 2014
Revised Manuscript: May 19, 2014
Manuscript Accepted: May 22, 2014
Published: June 2, 2014

Juan M. Merlo, Fan Ye, Binod Rizal, Michael J. Burns, and Michael J. Naughton, "Near-field observation of light propagation in nanocoax waveguides," Opt. Express 22, 14148-14154 (2014)

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