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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 4 — Feb. 15, 2012
  • pp: 746–748

Analysis of damping-induced phase flips of plasmonic nanowire modes

Andreas Hohenau, Primoz Kusar, Christian Gruber, and Joachim R. Krenn  »View Author Affiliations

Optics Letters, Vol. 37, Issue 4, pp. 746-748 (2012)

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We launch surface plasmons from one end of a silver nanowire by asymmetric illumination with white light and use plasmon-to-light scattering at the nanowire ends to probe spectroscopically the plasmonic Fabry–Perot wire modes. The spectral positions of the maxima and minima in the scattered intensity from both nanowire ends are found to be either in-phase or out-of-phase, depending on the nanowire length and the spectral range. This behavior can be explained by a generalized Fabry–Perot model. The turnover point between the two regimes is sensitive to the surface plasmon round trip losses and thus opens a new possibility for detecting changes of the optical absorption in the nanowire environment.

© 2012 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:
Optics at Surfaces

Original Manuscript: November 18, 2011
Revised Manuscript: December 22, 2011
Manuscript Accepted: December 23, 2011
Published: February 15, 2012

Virtual Issues
Vol. 7, Iss. 4 Virtual Journal for Biomedical Optics

Andreas Hohenau, Primoz Kusar, Christian Gruber, and Joachim R. Krenn, "Analysis of damping-induced phase flips of plasmonic nanowire modes," Opt. Lett. 37, 746-748 (2012)

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  13. Around this point Is,i has to be independent of k. By equating the coefficients of the cosine functions with identical periodicity in the denominator and numerator of Is,i, one obtains after some algebra Eq. (4).

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

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