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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 18 — Aug. 27, 2012
  • pp: 20535–20544

Novel hybrid plasmonic waveguide consisting of two identical dielectric nanowires symmetrically placed on each side of a thin metal film

Lin Chen, Tian Zhang, Xun Li, and Weiping Huang  »View Author Affiliations


Optics Express, Vol. 20, Issue 18, pp. 20535-20544 (2012)
http://dx.doi.org/10.1364/OE.20.020535


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Abstract

It is well-known that, a dielectric cylinder on a metal surface offers the advantage of not yielding singular field, which would effectively reduce the propagation loss as opposed to a rectangle-shaped waveguide on a metal surface. In this article, a novel hybrid plasmonic waveguide consisting of two identical dielectric nanowires symmetrically placed on each side of a thin metal film is presented. With the strong interaction between the dielectric cylindrical waveguide mode and long-range surface plasmon polaritons (LRSPP) mode of a thin metal film, deep-subwavelength mode confinement can be achieved. Compared with the hybrid plasmonic mode guided in only one dielectric nanowire above a metal film, a much larger propagation length as well as improved figure of merit (FoM) can be simultaneously realized. A typical propagation length is 434μm, and optical field is confined into an ultra-small area of approximately 0.0096μm2 at 1.55μm. This structure could enable various applications such as nanophotonic waveguides, high-quality nanolasers, and optical trapping and transportation of nanoparticles and biomolecules.

© 2012 OSA

OCIS Codes
(130.2790) Integrated optics : Guided waves
(240.6680) Optics at surfaces : Surface plasmons
(250.5300) Optoelectronics : Photonic integrated circuits

ToC Category:
Integrated Optics

History
Original Manuscript: June 18, 2012
Revised Manuscript: August 3, 2012
Manuscript Accepted: August 3, 2012
Published: August 22, 2012

Citation
Lin Chen, Tian Zhang, Xun Li, and Weiping Huang, "Novel hybrid plasmonic waveguide consisting of two identical dielectric nanowires symmetrically placed on each side of a thin metal film," Opt. Express 20, 20535-20544 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-18-20535


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