Format

Send to

Choose Destination
See comment in PubMed Commons below
Opt Lett. 2013 Apr 15;38(8):1322-4. doi: 10.1364/OL.38.001322.

Group delay and dispersion in adiabatic plasmonic nanofocusing.

Author information

1
Department of Physics, Department of Chemistry, and JILA, University of Colorado, Boulder, Colorado 80309, USA.

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 25 fs(2) second-order dispersion observed, provides the fundamental basis for the use of plasmons for broadband slow-light applications.

PMID:
23595472
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Loading ...
    Support Center