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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 16 — Aug. 7, 2006
  • pp: 6993–6998

Dispersion shifts in optical nanowires with thin dielectric coatings

Jingyi Lou, Limin Tong, and Zhizhen Ye  »View Author Affiliations


Optics Express, Vol. 14, Issue 16, pp. 6993-6998 (2006)
http://dx.doi.org/10.1364/OE.14.006993


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Abstract

Based on exact solutions of Maxwell’s equations of a 3-layer-structured cylindrical waveguide, we calculated dispersion shifts in thin-dielectric-coated optical nanowires. Typical parameters of silica and silicon nanowires are used for numerical simulations. It shows that, the dispersion of a nanowire waveguide can be made highly sensitive to the thickness and index of the coating layer, and a thin coat may lead to considerable dispersion shift of the guided light. For example, in a 300-nm-diameter silicon nanowire, a 1% decrease in diameter of the silicon core by oxidation of silicon into silica shell leads to a 34% decrease in dispersion at 1450-nm wavelength. Results presented in this work suggest the possibility of tuning waveguide dispersions of optical nanowires by coating thin dielectric layers.

© 2006 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(060.2400) Fiber optics and optical communications : Fiber properties
(260.2030) Physical optics : Dispersion
(310.6860) Thin films : Thin films, optical properties

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: June 7, 2006
Revised Manuscript: July 11, 2006
Manuscript Accepted: July 16, 2006
Published: August 7, 2006

Citation
Jingyi Lou, Limin Tong, and Zhizhen Ye, "Dispersion shifts in optical nanowires with thin dielectric coatings," Opt. Express 14, 6993-6998 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-16-6993


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