Analysis of damping-induced phase flips of plasmonic nanowire modes

Optics Letters
Andreas HohenauJoachim R Krenn

Abstract

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.

References

Dec 31, 2005·Physical Review Letters·Harald DitlbacherJoachim R Krenn
Oct 10, 2006·Physical Review Letters·D E ChangM D Lukin
Apr 1, 1997·Optics Letters·J TakaharaT Kobayashi
Aug 24, 2010·Nano Letters·Jens DorfmüllerKlaus Kern
Jan 28, 2011·Nano Letters·Timur ShegaiMikael Käll

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Citations

Mar 14, 2013·Optics Express·Houqiang JiangHai Ming
Nov 12, 2013·Nano Letters·Lindsey J E AndersonJason H Hafner

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