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Coupled SPP Modes on 1D Plasmonic Gratings in Conical Mounting

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An Erratum to this article was published on 27 May 2014

Abstract

Plasmonic nanostructures exhibit a variety of surface plasmon polariton (SPP) modes, with different characteristic properties. While a single metal dielectric interface supports a single-interface SPP mode, a thin metal film can support extended long range SPPs and strongly confined short range SPPs. When the coupling between the incident light and the SPP is provided through a diffraction grating, it is possible to azimuthally rotate the grating with respect to the scattering plane, introducing the possibility to propagate the SPP along an arbitrary direction. We present a theoretical and experimental analysis of the coupling conditions for long range and short range SPPs under this configuration. We also investigate the propagation length of the modes depending on the propagation direction with respect to the grating grooves, showing in particular that the long range SPP propagation length can be sensibly enhanced with respect to the null-azimuth case.

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Acknowledgments

The authors gratefully acknowledge the University of Padova through the PLATFORMS strategic project “Plasmonic nano-textured materials and architectures for enhanced molecular sensing” STPD089KSC.

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Authors and Affiliations

  1. Department of Physics and Astronomy “G. Galilei”, University of Padova, Via Marzolo 8, Padova, 35131, Italy

    E. Gazzola & F. Romanato

  2. LaNN, Laboratory for Nanofabrication of Nanodevices, Veneto Nanotech, Corso Stati Uniti 4, Padova, 35127, Italy

    E. Gazzola, G. Zacco, P. Zilio, G. Ruffato & F. Romanato

  3. Industrial Engineering Department and INSTM, University of Padova, Via Marzolo 9, Padova, 35131, Italy

    L. Brigo & G. Brusatin

  4. Istituto Officina dei Materiali, IOM-CNR, Area Science Park, Strada Statale 14 Km 163.5, Trieste, 34149, Italy

    G. Zacco & F. Romanato

Authors
  1. E. Gazzola
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  2. L. Brigo
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  3. G. Zacco
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  4. P. Zilio
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  5. G. Ruffato
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  6. G. Brusatin
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  7. F. Romanato
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Correspondence to E. Gazzola.

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Gazzola, E., Brigo, L., Zacco, G. et al. Coupled SPP Modes on 1D Plasmonic Gratings in Conical Mounting. Plasmonics 9, 867–876 (2014). https://doi.org/10.1007/s11468-013-9624-9

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  • DOI: https://doi.org/10.1007/s11468-013-9624-9

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