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Direct Observation of Plasmon Band Formation and Delocalization in Quasi-Infinite Nanoparticle Chains

[Image: see text] Chains of metallic nanoparticles sustain strongly confined surface plasmons with relatively low dielectric losses. To exploit these properties in applications, such as waveguides, the fabrication of long chains of low disorder and a thorough understanding of the plasmon-mode proper...

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Autores principales: Mayer, Martin, Potapov, Pavel L., Pohl, Darius, Steiner, Anja Maria, Schultz, Johannes, Rellinghaus, Bernd, Lubk, Axel, König, Tobias A. F., Fery, Andreas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6571934/
https://www.ncbi.nlm.nih.gov/pubmed/31117756
http://dx.doi.org/10.1021/acs.nanolett.9b01031
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author Mayer, Martin
Potapov, Pavel L.
Pohl, Darius
Steiner, Anja Maria
Schultz, Johannes
Rellinghaus, Bernd
Lubk, Axel
König, Tobias A. F.
Fery, Andreas
author_facet Mayer, Martin
Potapov, Pavel L.
Pohl, Darius
Steiner, Anja Maria
Schultz, Johannes
Rellinghaus, Bernd
Lubk, Axel
König, Tobias A. F.
Fery, Andreas
author_sort Mayer, Martin
collection PubMed
description [Image: see text] Chains of metallic nanoparticles sustain strongly confined surface plasmons with relatively low dielectric losses. To exploit these properties in applications, such as waveguides, the fabrication of long chains of low disorder and a thorough understanding of the plasmon-mode properties, such as dispersion relations, are indispensable. Here, we use a wrinkled template for directed self-assembly to assemble chains of gold nanoparticles. With this up-scalable method, chain lengths from two particles (140 nm) to 20 particles (1500 nm) and beyond can be fabricated. Electron energy-loss spectroscopy supported by boundary element simulations, finite-difference time-domain, and a simplified dipole coupling model reveal the evolution of a band of plasmonic waveguide modes from degenerated single-particle modes in detail. In striking difference from plasmonic rod-like structures, the plasmon band is confined in excitation energy, which allows light manipulations below the diffraction limit. The non-degenerated surface plasmon modes show suppressed radiative losses for efficient energy propagation over a distance of 1500 nm.
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spelling pubmed-65719342019-06-20 Direct Observation of Plasmon Band Formation and Delocalization in Quasi-Infinite Nanoparticle Chains Mayer, Martin Potapov, Pavel L. Pohl, Darius Steiner, Anja Maria Schultz, Johannes Rellinghaus, Bernd Lubk, Axel König, Tobias A. F. Fery, Andreas Nano Lett [Image: see text] Chains of metallic nanoparticles sustain strongly confined surface plasmons with relatively low dielectric losses. To exploit these properties in applications, such as waveguides, the fabrication of long chains of low disorder and a thorough understanding of the plasmon-mode properties, such as dispersion relations, are indispensable. Here, we use a wrinkled template for directed self-assembly to assemble chains of gold nanoparticles. With this up-scalable method, chain lengths from two particles (140 nm) to 20 particles (1500 nm) and beyond can be fabricated. Electron energy-loss spectroscopy supported by boundary element simulations, finite-difference time-domain, and a simplified dipole coupling model reveal the evolution of a band of plasmonic waveguide modes from degenerated single-particle modes in detail. In striking difference from plasmonic rod-like structures, the plasmon band is confined in excitation energy, which allows light manipulations below the diffraction limit. The non-degenerated surface plasmon modes show suppressed radiative losses for efficient energy propagation over a distance of 1500 nm. American Chemical Society 2019-05-22 2019-06-12 /pmc/articles/PMC6571934/ /pubmed/31117756 http://dx.doi.org/10.1021/acs.nanolett.9b01031 Text en Copyright © 2019 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes.
spellingShingle Mayer, Martin
Potapov, Pavel L.
Pohl, Darius
Steiner, Anja Maria
Schultz, Johannes
Rellinghaus, Bernd
Lubk, Axel
König, Tobias A. F.
Fery, Andreas
Direct Observation of Plasmon Band Formation and Delocalization in Quasi-Infinite Nanoparticle Chains
title Direct Observation of Plasmon Band Formation and Delocalization in Quasi-Infinite Nanoparticle Chains
title_full Direct Observation of Plasmon Band Formation and Delocalization in Quasi-Infinite Nanoparticle Chains
title_fullStr Direct Observation of Plasmon Band Formation and Delocalization in Quasi-Infinite Nanoparticle Chains
title_full_unstemmed Direct Observation of Plasmon Band Formation and Delocalization in Quasi-Infinite Nanoparticle Chains
title_short Direct Observation of Plasmon Band Formation and Delocalization in Quasi-Infinite Nanoparticle Chains
title_sort direct observation of plasmon band formation and delocalization in quasi-infinite nanoparticle chains
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6571934/
https://www.ncbi.nlm.nih.gov/pubmed/31117756
http://dx.doi.org/10.1021/acs.nanolett.9b01031
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