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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 1, Iss. 2 — Jun. 1, 2011
  • pp: 128–137

Anomalous permittivity and plasmon resonances of copper nanoparticle conformal coatings on optical fibers [Invited]

Li-Yang Shao, Jason P. Coyle, Seán T. Barry, and Jacques Albert  »View Author Affiliations


Optical Materials Express, Vol. 1, Issue 2, pp. 128-137 (2011)
http://dx.doi.org/10.1364/OME.1.000128


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Abstract

The conformal coating of a 50 nm-thick layer of copper nanoparticles deposited with pulse chemical vapor deposition of a copper (I) guanidinate precursor on the cladding of a single mode optical fiber was monitored by using a tilted fiber Bragg grating (TFBG) photo-inscribed in the fiber core. The pulse-per-pulse growth of the copper nanoparticles is readily obtained from the position and amplitudes of resonances in the reflection spectrum of the grating. In particular, we confirm that the real part of the effective complex permittivity of the deposited nano-structured copper layer is an order of magnitude larger than that of a bulk copper film at an optical wavelength of 1550 nm. We further observe a transition in the growth behavior from granular to continuous film (as determined from the complex material permittivity) after approximately 20 pulses (corresponding to an effective thickness of 25 nm). Finally, despite the remaining granularity of the film, the final copper-coated optical fiber is shown to support plasmon waves suitable for sensing, even after the growth of a thin oxide layer on the copper surface.

© 2011 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(160.3900) Materials : Metals
(240.6680) Optics at surfaces : Surface plasmons
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings
(160.4236) Materials : Nanomaterials

ToC Category:
Nanomaterials

History
Original Manuscript: March 14, 2011
Revised Manuscript: April 21, 2011
Manuscript Accepted: April 21, 2011
Published: April 27, 2011

Virtual Issues
Advances in Optical Materials (2011) Optical Materials Express

Citation
Li-Yang Shao, Jason P. Coyle, Seán T. Barry, and Jacques Albert, "Anomalous permittivity and plasmon resonances of copper nanoparticle conformal coatings on optical fibers," Opt. Mater. Express 1, 128-137 (2011)
http://www.opticsinfobase.org/ome/abstract.cfm?URI=ome-1-2-128


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