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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 22 — Oct. 26, 2009
  • pp: 19435–19443

Improved bending loss characteristics of asymmetric surface plasmonic waveguides for flexible optical wiring

Sangjun Lee, Sangin Kim, and Hanjo Lim  »View Author Affiliations

Optics Express, Vol. 17, Issue 22, pp. 19435-19443 (2009)

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We present improved characteristics of the curved plasmonic waveguide which consists of a thin metal stripe with asymmetric cladding layers. It is shown that in the proposed curved asymmetric plasmonic waveguides, a balance between a radiation due to bending and a radiation due to the asymmetric claddings allows a bending with a smaller radius curvature and a lower loss compared to the waveguide with symmetric claddings. At the same time, a symmetric metal stripe waveguide’s typical trade-off between the bending characteristics and the propagation loss of a straight waveguide is relaxed with proper amount of asymmetry. With the proposed structure, a plasmonic waveguide bending whose radius is as small as 2 mm with a total loss of 1.8 dB/90° is designed. Enhanced sensitivity to the surrounding medium and its application are discussed.

© 2009 OSA

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

Original Manuscript: September 8, 2009
Revised Manuscript: October 6, 2009
Manuscript Accepted: October 8, 2009
Published: October 12, 2009

Sangjun Lee, Sangin Kim, and Hanjo Lim, "Improved bending loss characteristics of asymmetric surface plasmonic waveguides for flexible optical wiring," Opt. Express 17, 19435-19443 (2009)

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