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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 14 — Jul. 4, 2011
  • pp: 12865–12872

Optical nanofocusing by tapering coupled photonic-plasmonic waveguides

Xiaolong He, Liu Yang, and Tian Yang  »View Author Affiliations


Optics Express, Vol. 19, Issue 14, pp. 12865-12872 (2011)
http://dx.doi.org/10.1364/OE.19.012865


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Abstract

We have numerically designed a compact structure to concentrate optical waves from a silicon-on-insulator waveguide to a deep sub-wavelength and high intensity surface plasmon focal spot at the tip of a metallic strip taper. A systematic design approach is developed to obtain an optimal photon-surface plasmon side coupling efficiency of up to 50% at 1.55 μm wavelength, and an over 50 times increase in electric field intensity in a focal region of around 20nm × 20nm × 7nm in size. The length of the whole device is 2.2 μm. We expect fabrication of the proposed device to be simpler than devices in previous work.

© 2011 OSA

OCIS Codes
(130.2790) Integrated optics : Guided waves
(240.6680) Optics at surfaces : Surface plasmons
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

History
Original Manuscript: March 22, 2011
Revised Manuscript: May 26, 2011
Manuscript Accepted: June 10, 2011
Published: June 20, 2011

Citation
Xiaolong He, Liu Yang, and Tian Yang, "Optical nanofocusing by tapering coupled photonic-plasmonic waveguides," Opt. Express 19, 12865-12872 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-14-12865


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