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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 20 — Sep. 26, 2011
  • pp: 18795–18806

Concentrating evanescent waves: Systematic analyses of properties of the needle beam in three-medium dielectric cylindrical waveguide

Fangli Qin and Yang Zhao  »View Author Affiliations


Optics Express, Vol. 19, Issue 20, pp. 18795-18806 (2011)
http://dx.doi.org/10.1364/OE.19.018795


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Abstract

Needle beam is a guided beam with nanoscale beam size and significant power propagating in core area of a three-layer dielectric waveguide. Systematical numerical analyses of properties of the needle beam are presented. Properties of the fundamental mode of the needle beam, including field distribution, power distribution, and power concentration, are calculated for different waveguide parameters. It is shown that there is an optimum value of normalized frequency for maximum power concentration. Concentrated power is higher if the refractive index difference between the core and the middle layer is higher.

© 2011 OSA

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(130.2790) Integrated optics : Guided waves
(230.7370) Optical devices : Waveguides
(240.0240) Optics at surfaces : Optics at surfaces
(260.2110) Physical optics : Electromagnetic optics

ToC Category:
Physical Optics

History
Original Manuscript: July 14, 2011
Revised Manuscript: August 26, 2011
Manuscript Accepted: August 29, 2011
Published: September 12, 2011

Citation
Fangli Qin and Yang Zhao, "Concentrating evanescent waves: Systematic analyses of properties of the needle beam in three-medium dielectric cylindrical waveguide," Opt. Express 19, 18795-18806 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-20-18795


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