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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 8 — Apr. 15, 2013
  • pp: 1322–1324

Group delay and dispersion in adiabatic plasmonic nanofocusing

Vasily Kravtsov, Joanna M. Atkin, and Markus B. Raschke  »View Author Affiliations


Optics Letters, Vol. 38, Issue 8, pp. 1322-1324 (2013)
http://dx.doi.org/10.1364/OL.38.001322


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Abstract

We study the decrease in group velocity of broadband surface plasmon polariton propagation on a conical tip, using femtosecond time-domain interferometry. The group delay of (9±3)fs measured corresponds to a group velocity at the apex of less than 0.2c. The result agrees in general with the prediction from adiabatic plasmonic nanofocusing theory, yet is sensitive with respect to the exact taper geometry near the apex. This, together with the sub 25fs2 second-order dispersion observed, provides the fundamental basis for the use of plasmons for broadband slow-light applications.

© 2013 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

History
Original Manuscript: February 4, 2013
Revised Manuscript: March 5, 2013
Manuscript Accepted: March 7, 2013
Published: April 12, 2013

Citation
Vasily Kravtsov, Joanna M. Atkin, and Markus B. Raschke, "Group delay and dispersion in adiabatic plasmonic nanofocusing," Opt. Lett. 38, 1322-1324 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-8-1322

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