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  Anisotropy Effects on the Plasmonic Response of Nanoparticle Dimers

Varas, A., García-González, P., García-Vidal, F. J., & Rubio, A. (2015). Anisotropy Effects on the Plasmonic Response of Nanoparticle Dimers. The Journal of Physical Chemistry Letters, 6(10), 1891-1898. doi:10.1021/acs.jpclett.5b00573.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-CBA0-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-AA31-0
Genre: Journal Article

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Locator:
https://dx.doi.org/10.1021/acs.jpclett.5b00573 (Publisher version)
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 Creators:
Varas, Alejandro1, 2, Author
García-González, Pablo2, 3, Author
García-Vidal, F. J.3, Author
Rubio, Angel1, 2, 3, 4, 5, Author              
Affiliations:
1Nano-Bio Spectroscopy group, Universidad del País Vasco UPV/EHU, CFM CSIC-UPV/EHU-MPC and DIPC, Avenida de Tolosa 72, E-20018 Donostia/San Sebastián, Spain, ou_persistent22              
2ETSF Scientific Development Centre, Avenida de Tolosa 72, E-20018 Donostia/San Sebastián, Spain, ou_persistent22              
3Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, E-28049 Cantoblanco, Madrid, Spain, ou_persistent22              
4Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2074320              
5Center for Free-Electron Laser Science and Department of Physics, Luruper Chaussee 149, 22761 Hamburg, Germany, ou_persistent22              

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Free keywords: quantum plasmonics; ab-initio methods; photoinduced tunneling; nanoparticle dimer; charge-transfer modes; surface-plasmon hybridization
 Abstract: We present an ab initio study of the anisotropy and atomic relaxation effects on the optical properties of nanoparticle dimers. Special emphasis is placed on the hybridization process of localized surface plasmons, plasmon-mediated photoinduced currents, and electric-field enhancement in the dimer junction. We show that there is a critical range of separations between the clusters (0.1–0.5 nm) in which the detailed atomic structure in the junction and the relative orientation of the nanoparticles have to be considered to obtain quantitative predictions for realistic nanoplasmonic devices. It is worth noting that this regime is characterized by the emergence of electron tunneling as a response to the driven electromagnetic field. The orientation of the particles not only modifies the attainable electric field enhancement but can lead to qualitative changes in the optical absorption spectrum of the system.

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Language(s): eng - English
 Dates: 2015-03-182015-04-292015-04-302015-05-21
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1021/acs.jpclett.5b00573
 Degree: -

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Title: The Journal of Physical Chemistry Letters
  Other : J. Phys. Chem. Lett.
  Abbreviation : JPCLett
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 6 (10) Sequence Number: - Start / End Page: 1891 - 1898 Identifier: CoNE: /journals/resource/1948-7185