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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 16 — Aug. 1, 2011
  • pp: 15281–15296

Non-local energy transport in tunneling and plasmonic structures

Winston Frias, Andrei Smolyakov, and Akira Hirose  »View Author Affiliations


Optics Express, Vol. 19, Issue 16, pp. 15281-15296 (2011)
http://dx.doi.org/10.1364/OE.19.015281


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Abstract

Various definitions of the velocity of propagation of the electromagnetic field have been adopted in experimental and theoretical studies of tunneling and plasmonic systems. Tunneling problems are often analyzed by invoking the group delay (or dwell time) velocities. On the other hand, slow light and plasmonic systems are considered by using the wave packet group velocity. This paper discusses various definitions for the velocity of the electromagnetic wave propagation and compares them in applications to the problems of slow light and superluminality in resonant and tunneling structures. Energy propagation is, in general, a nonlocal quantity and depends on the global properties of the system, rather than being simply a local quantity. The energy propagation velocity takes into account the non-local characteristics of the wave propagation and offers a natural generalization for those situations when the group velocity is ill defined or gives unphysical results. It is shown that the group delay velocity, which may be superluminal away from the resonance, becomes equal to the energy velocity at the resonant point.

© 2011 OSA

OCIS Codes
(240.0310) Optics at surfaces : Thin films
(240.6690) Optics at surfaces : Surface waves
(240.7040) Optics at surfaces : Tunneling

ToC Category:
Optics at Surfaces

History
Original Manuscript: March 4, 2011
Revised Manuscript: June 22, 2011
Manuscript Accepted: July 5, 2011
Published: July 26, 2011

Citation
Winston Frias, Andrei Smolyakov, and Akira Hirose, "Non-local energy transport in tunneling and plasmonic structures," Opt. Express 19, 15281-15296 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-16-15281


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