The complex dispersion relation of surface plasmon polaritons at gold/para-hexaphenylene interfaces

Christoph Lemke, Till Leißner, Alwin Klick, Jacek Fiutowski, Jörn W. Radke, Martin Thomaschewski, Jakob Kjelstrup-Hansen, Horst-Günter Rubahn, Michael Bauer

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Two-photon photoemission electron microscopy
(2P-PEEM) is used to measure the real and imaginary
part of the dispersion relation of surface plasmon polaritons
at different interface systems. A comparison of calculated
and measured dispersion data for a gold/vacuum interface
demonstrates the capability of the presented experimental
approach. A systematic 2P-PEEM study on the dispersion
relation of dielectric-loaded gold surfaces shows how
effective the propagation of surface plasmon polaritons at a
gold/para-hexaphenylene interface can be tuned by
adjustment of the dielectric film thickness. Deviations of
the experimental results from effective index calculations
indicate the relevance of thin film peculiarities arising from
the details of the growth process and corroborate the need
of experimental analysis techniques for dispersion relation
measurements.
Original languageEnglish
JournalApplied physics. B, Lasers and optics (Print)
Volume116
Issue number3
Pages (from-to)585-591
Number of pages7
ISSN0946-2171
DOIs
Publication statusPublished - 1. Sep 2014

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