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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 2 — Jan. 18, 2010
  • pp: 598–623

Trapping light in plasmonic waveguides

Junghyun Park, Kyoung-Youm Kim, Il-Min Lee, Hyunmin Na, Seung-Yeol Lee, and Byoungho Lee  »View Author Affiliations

Optics Express, Vol. 18, Issue 2, pp. 598-623 (2010)

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We present comprehensive case studies on trapping of light in plasmonic waveguides, including the metal-insulator-metal (MIM) and insulator-metal-insulator (IMI) waveguides. Due to the geometrical symmetry, the guided modes are classified into the anti-symmetric and symmetric modes. For the lossless case, where the relative electric permittivity of metal (εm ) and dielectric (εd ) are purely real, we define ρ as ρ = -εm /εd . It is shown that trapping of light occurs in the following cases: the anti-symmetric mode in the MIM waveguide with 1 < ρ < 1.28, the symmetric mode in the MIM waveguide with ρ ≪ 1, and the symmetric mode in the IMI waveguide with ρ < 1. The physical interpretation reveals that these conditions are closely connected with the field distributions in the core and the cladding. Various mode properties such as the number of supported modes and the core width for the mode cut off are also presented.

© 2010 Optical Society of America

OCIS Codes
(230.7400) Optical devices : Waveguides, slab
(240.6680) Optics at surfaces : Surface plasmons
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

Original Manuscript: November 2, 2009
Revised Manuscript: December 17, 2009
Manuscript Accepted: December 20, 2009
Published: January 4, 2010

Junghyun Park, Kyoung-Youm Kim, Il-Min Lee, Hyunmin Na, Seung-Yeol Lee, and Byoungho Lee, "Trapping light in plasmonic waveguides," Opt. Express 18, 598-623 (2010)

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