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Tunable plasmonic r...
Tunable plasmonic resonances in Si-Au slanted columnar heterostructure thin films
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- Kilic, Ufuk (författare)
- Univ Nebraska Lincoln, NE 68588 USA
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- Mock, Alyssa (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten,Univ Nebraska Lincoln, NE 68588 USA
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- Feder, Rene (författare)
- Fraunhofer Inst Microstruct Mat and Syst IMWS, Germany
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- Sekora, Derek (författare)
- Univ Nebraska Lincoln, NE 68588 USA
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- Hilfiker, Matthew (författare)
- Univ Nebraska Lincoln, NE 68588 USA
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- Korlacki, Rafal (författare)
- Univ Nebraska Lincoln, NE 68588 USA
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- Schubert, Eva (författare)
- Univ Nebraska Lincoln, NE 68588 USA
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- Argyropoulos, Christos (författare)
- Univ Nebraska Lincoln, NE 68588 USA
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- Schubert, Mathias (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten,Univ Nebraska Lincoln, NE 68588 USA; Leibniz Inst Polymer Res Dresden, Germany
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(creator_code:org_t)
- 2019-01-11
- 2019
- Engelska.
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Ingår i: Scientific Reports. - : NATURE PUBLISHING GROUP. - 2045-2322. ; 9
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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https://www.nature.c...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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