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Macroscopic Layers ...
Macroscopic Layers of Chiral Plasmonic Nanoparticle Oligomers from Colloidal Lithography
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- Ogier, Robin, 1987 (författare)
- Dept Appl Phys, Chalmers, Gothenburg, Sweden,Chalmers tekniska högskola,Chalmers University of Technology
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- Fang, Yurui, 1983 (författare)
- Dept Appl Phys, Chalmers, Gothenburg, Sweden,Chalmers tekniska högskola,Chalmers University of Technology
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- Svedendahl, Mikael, 1984 (författare)
- Dept Appl Phys, Chalmers, Gothenburg, Sweden,Chalmers tekniska högskola,Chalmers University of Technology
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- Johansson, Peter, 1961- (författare)
- Örebro universitet,Institutionen för naturvetenskap och teknik,Dept Appl Phys, Chalmers, Gothenburg, Sweden,Chalmers tekniska högskola,Chalmers University of Technology
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- Käll, Mikael, 1963 (författare)
- Dept Appl Phys, Chalmers, Gothenburg, Sweden,Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2014-10-03
- 2014
- Engelska.
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Ingår i: ACS Photonics. - : American Chemical Society (ACS). - 2330-4022. ; 1:10, s. 1074-1081
- Relaterad länk:
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- Optical near-field coupling between closely spaced plasmonic metal nanoparticles is important to a range of nanophotonic applications of high contemporary interest, including surface-enhanced molecular spectroscopy, nanooptical sensing, and various novel light-harvesting concepts. Here we report on monolayers of chiral heterotrimers and heterotetramers composed of closely spaced silver and/or gold nanodisks of different heights fabricated through facile hole-mask colloidal lithography. These quasi-three-dimensional oligomers are interesting for applications because they exhibit "hot" gaps and crevices of nanometric dimensions, a pronounced circular dichroism, and optical chirality in the visible to near-infrared wavelength range, and they can be produced in large ensembles (>109) of identical orientation. We analyze the optical properties of the samples based on simulation results and find that the circular dichroism is due to strong near-field coupling and intricate phase retardation effects originating in the three-dimensional character of the individual oligomers.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
Nyckelord
- plasmonics
- optical chirality
- circular dichroism
- hole-mask colloidal lithography
- oligomers
- numerical simulation
- Physics
- Fysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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