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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 5 — Mar. 5, 2007
  • pp: 2607–2612

Optical 3D cavity modes below the diffraction-limit using slow-wave surface-plasmon-polaritons

Eyal Feigenbaum and Meir Orenstein  »View Author Affiliations

Optics Express, Vol. 15, Issue 5, pp. 2607-2612 (2007)

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Modal volumes at the nano-scale, much smaller than the “diffraction-limit”, with appreciable quality factors, are calculated for a dielectric cavity embedded in a space between metal plates. The modal field is bounded between the metal interfaces in one dimension and can be reduced in size almost indefinitely in this dimension. But more surprisingly, due to the “plasmonic” slow wave effect, this reduction is accompanied by a similar in-plane modal size reduction. Another interesting result is that higher order cavity modes exhibit lower radiation loss. The scheme is studied with effective index analysis, and validated by FDTD simulations.

© 2007 Optical Society of America

OCIS Codes
(230.5750) Optical devices : Resonators
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

Original Manuscript: January 23, 2007
Revised Manuscript: February 18, 2007
Manuscript Accepted: February 19, 2007
Published: March 5, 2007

Eyal Feigenbaum and Meir Orenstein, "Optical 3D cavity modes below the diffraction-limit using slow-wave surface-plasmon-polaritons," Opt. Express 15, 2607-2612 (2007)

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Fig. 1. Fig. 2. Fig. 3.

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