English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/136769
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Plasmonic response of metallic nanojunctions driven by single atom motion: Quantum transport revealed in optics

AuthorsMarchesin, Federico CSIC; Koval, P. CSIC ORCID; Barbry, Marc; Aizpurua, Javier CSIC ORCID ; Sánchez-Portal, Daniel CSIC ORCID
KeywordsQuantum transport
TDDFT calculations
Optical response
Issue Date2016
PublisherAmerican Chemical Society
CitationACS Photonics 3(2): 269-277 (2016)
AbstractThe correlation between transport properties across subnanometric metallic gaps and the optical response of the system is a complex effect that is determined by the fine atomic-scale details of the junction structure. As experimental advances are progressively accessing transport and optical characterization of smaller nanojunctions, a clear connection between the structural, electronic, and optical properties in these nanocavities is needed. Using ab initio calculations, we present here a study of the simultaneous evolution of the structure and the optical response of a plasmonic junction as the particles forming the cavity, two Na380 clusters, approach and retract. Atomic reorganizations are responsible for a large hysteresis of the plasmonic response of the system, which shows a jump-to-contact instability during the approach process and the formation of an atom-sized neck across the junction during retraction. Our calculations demonstrate that, due to the quantization of the conductance in metal nanocontacts, atomic-scale reconfigurations play a crucial role in determining the optical response of the whole system. We observe abrupt changes in the intensities and spectral positions of the dominating plasmon resonances and find a one-to-one correspondence between these jumps and those of the quantized transport as the neck cross-section diminishes. These results reveal an important connection between transport and optics at the atomic scale, which is at the frontier of current optoelectronics and can drive new options in optical engineering of signals driven by the motion and manipulation of single atoms.
Publisher version (URL)http://dx.doi.org/10.1021/acsphotonics.5b00609
Identifiersdoi: 10.1021/acsphotonics.5b00609
e-issn: 2330-4022
Appears in Collections:(CFM) Artículos
Files in This Item:
File Description SizeFormat 
Revealed Optics.pdf1,89 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.