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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 12 — Dec. 1, 2008
  • pp: C127–C135

Enhancement of dispersion modulation in nanoscale waveguides

Alexander A. Govyadinov and Viktor A. Podolskiy  »View Author Affiliations

JOSA B, Vol. 25, Issue 12, pp. C127-C135 (2008)

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We analyze the behavior of group and phase velocities in optical waveguides supporting strongly confined propagating modes. We discuss the implications of material absorption for electromagnetic properties of nanoguides and develop an analytical description of the interplay between geometry-induced and materials-induced dispersions. In the limit of strong confinement, the phase velocity of waveguide modes becomes vanishingly small, while group velocity can be modulated from negative to positive values. The modulation of group velocity is enhanced by the factor of λ 2 R 2 with respect to macroscopic systems. Both slow- and fast-light regimes can be achieved in the same nanoguiding structure, and dynamical switching between the two regimes is possible. Applications of the developed formalism lie in the field of ultrafast active nanophotonics.

© 2008 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(260.2030) Physical optics : Dispersion
(160.3918) Materials : Metamaterials

ToC Category:
Slow Light in Coupled Resonators and Waveguides

Original Manuscript: April 16, 2008
Revised Manuscript: July 25, 2008
Manuscript Accepted: August 29, 2008
Published: October 22, 2008

Alexander A. Govyadinov and Viktor A. Podolskiy, "Enhancement of dispersion modulation in nanoscale waveguides," J. Opt. Soc. Am. B 25, C127-C135 (2008)

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