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Tunable plasmonic r...
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Kilic, UfukUniv Nebraska Lincoln, NE 68588 USA
(author)
Tunable plasmonic resonances in Si-Au slanted columnar heterostructure thin films
- Article/chapterEnglish2019
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2019-01-11
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NATURE PUBLISHING GROUP,2019
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electronicrdacarrier
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LIBRIS-ID:oai:DiVA.org:liu-154098
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https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-154098URI
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https://doi.org/10.1038/s41598-018-37153-xDOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
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Funding Agencies|National Science Foundation (NSF) through the Nebraska Materials Research Science and Engineering Center (MRSEC) [DMR-1420645, CMMI 1337856, EAR 1521428, DMR 1808715]; German Research Foundation [FE 1532/1-1]; Air Force Research Office [FA9550-18-1-0360]; American Chemical Society [ACS PRF 59374-ND5]; University of Nebraska-Lincoln; J.A. Woollam Co., Inc.; J.A. Woollam Foundation
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We report on fabrication of spatially-coherent columnar plasmonic nanostructure superlattice-type thin films with high porosity and strong optical anisotropy using glancing angle deposition. Subsequent and repeated depositions of silicon and gold lead to nanometer-dimension subcolumns with controlled lengths. We perform generalized spectroscopic ellipsometry measurements and finite element method computations to elucidate the strongly anisotropic optical properties of the highly-porous Si-Au slanted columnar heterostructures. The occurrence of a strongly localized plasmonic mode with displacement pattern reminiscent of a dark quadrupole mode is observed in the vicinity of the gold subcolumns. We demonstrate tuning of this quadrupole-like mode frequency within the near-infrared spectral range by varying the geometry of Si-Au slanted columnar heterostructures. In addition, coupled-plasmon-like and inter-band transition-like modes occur in the visible and ultra-violet spectral regions, respectively. We elucidate an example for the potential use of Si-Au slanted columnar heterostructures as a highly porous plasmonic sensor with optical read out sensitivity to few parts-per-million solvent levels in water.
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Mock, AlyssaLinköpings universitet,Halvledarmaterial,Tekniska fakulteten,Univ Nebraska Lincoln, NE 68588 USA(Swepub:liu)alymo28
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Feder, ReneFraunhofer Inst Microstruct Mat and Syst IMWS, Germany
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Sekora, DerekUniv Nebraska Lincoln, NE 68588 USA
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Hilfiker, MatthewUniv Nebraska Lincoln, NE 68588 USA
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Korlacki, RafalUniv Nebraska Lincoln, NE 68588 USA
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Schubert, EvaUniv Nebraska Lincoln, NE 68588 USA
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Argyropoulos, ChristosUniv Nebraska Lincoln, NE 68588 USA
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Schubert, MathiasLinköpings universitet,Halvledarmaterial,Tekniska fakulteten,Univ Nebraska Lincoln, NE 68588 USA; Leibniz Inst Polymer Res Dresden, Germany(Swepub:liu)schma39
(author)
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Univ Nebraska Lincoln, NE 68588 USAHalvledarmaterial
(creator_code:org_t)
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In:Scientific Reports: NATURE PUBLISHING GROUP92045-2322
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