Volume 116, Number 6, December 2016
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||03 February 2017|
Partially coherent surface plasmon polaritons
1 Institute of Photonics, University of Eastern Finland - P.O. Box 111, FI-80101 Joensuu, Finland
2 Department of Electrical and Computer Engineering, Dalhousie University - Halifax, Nova Scotia, B3J 2X4, Canada
Received: 14 November 2016
Accepted: 9 January 2017
We formulate a framework to tailor the electromagnetic coherence of polychromatic surface plasmon polaritons (SPPs) at a metal-air interface by controlling the correlations of the excitation light. The formalism covers stationary and nonstationary SPP fields of arbitrary spectra. We show that narrowband SPPs are virtually propagation invariant and strictly polarized, whereas the coherence properties of broadband SPPs can be widely tuned to specific applications. The connection between the coherence state of the light source and the ensuing SPP field establishes a novel paradigm in statistical plasmonics with far-reaching implications for plasmon coherence engineering.
PACS: 42.25.-p – Wave optics / 42.25.Kb – Coherence / 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
© EPLA, 2016
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