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Plasmonic wave propagation in silver nanowires: guiding modes or not?
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Optics and Photonics, OFO.
2013 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 21, no 7, 8587-8595 p.Article in journal (Refereed) Published
Abstract [en]

Propagation modes and single-guiding-mode conditions of one-dimensional silver nanowires based surface plasmon polariton (SPP) waveguides versus the operating wavelength (500-2000 nm) are investigated. For silver nanowires immersed in a SiO2 matrix, both short-range SPP (SRSPP)-like modes and long-range SPP (LRSPP)-like modes can be guided. However, only the LRSPP-like modes have cutoff radii. For silver nanowires on a SiO2 substrate, the LRSPP-like modes cannot be supported due to asymmetry. While for the SRSPP-like guiding mode, it has a cutoff radius for wavelength longer than 615 nm. For wavelength shorter than 615 nm, there is no cutoff radius for the guiding modes due to the appearance of the interface modes and thus the single-guiding-mode operation is always satisfied.

Place, publisher, year, edition, pages
2013. Vol. 21, no 7, 8587-8595 p.
Keyword [en]
Cutoff radius, Guiding mode, Interface mode, Operating wavelength, Plasmonic, Propagation mode, Silver nanowires, Surface plasmon polaritons
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-122518DOI: 10.1364/OE.21.008587ISI: 000317659300074Scopus ID: 2-s2.0-84875991932OAI: oai:DiVA.org:kth-122518DiVA: diva2:623003
Funder
Swedish Foundation for Strategic Research Swedish Research Council
Note

QC 20130524

Available from: 2013-05-24 Created: 2013-05-23 Last updated: 2017-12-06Bibliographically approved

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