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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 10 — May. 11, 2009
  • pp: 8036–8045

High efficiency excitation of plasmonic waveguides with vertically integrated resonant bowtie apertures

Edward C. Kinzel and Xianfan Xu  »View Author Affiliations


Optics Express, Vol. 17, Issue 10, pp. 8036-8045 (2009)
http://dx.doi.org/10.1364/OE.17.008036


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Abstract

In recent years, many nanophotonic devices have been developed. Much attention has been given to the waveguides carrying surface plasmon polariton modes with subwavelength confinement and long propagation length. However, coupling far field light into a nano structure is a significant challenge. In this work, we present an architecture that enables high efficiency excitation of nanoscale waveguides in the direction normal to the waveguide. Our approach employs a bowtie aperture to provide both field confinement and high transmission efficiency. More than six times the power incident on the open area of the bowtie aperture can be coupled into the waveguide. The intensity in the waveguide can be more than twenty times higher than that of the incident light, with mode localization better than λ2/250. The vertical excitation of waveguide allows easy integration. The bowtie aperture/waveguide architecture presented in this work will open up numerous possibilities for the development of nanoscale optical systems for applications ranging from localized chemical sensing to compact communication devices.

© 2009 OSA

OCIS Codes
(130.2790) Integrated optics : Guided waves
(230.7390) Optical devices : Waveguides, planar
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

History
Original Manuscript: February 20, 2009
Revised Manuscript: April 26, 2009
Manuscript Accepted: April 28, 2009
Published: April 29, 2009

Citation
Edward C. Kinzel and Xianfan Xu, "High efficiency excitation of plasmonic waveguides with vertically integrated resonant bowtie apertures," Opt. Express 17, 8036-8045 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-10-8036


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