2024-03-28T16:27:56Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1367692020-09-29T09:17:23Zcom_10261_115com_10261_3col_10261_368
Plasmonic response of metallic nanojunctions driven by single atom motion: Quantum transport revealed in optics
Marchesin, Federico
Koval, P.
Barbry, Marc
Aizpurua, Javier
Sánchez-Portal, Daniel
Eurorregión Aquitania Euskadi
Agence Nationale de la Recherche (France)
Ministerio de Economía y Competitividad (España)
Eusko Jaurlaritza
Diputación Foral de Guipúzcoa
European Commission
Department of Commerce (US)
National Institute of Standards and Technology (US)
Quantum transport
Optoelectronics
TDDFT calculations
Optical response
Nanocontacts
Plasmonics
The 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.
We acknowledge financial support from Projects FIS2013-41184-P and MAT2013-46593-C6-2-P from MINECO. M.B., P.K., F.M., and D.S.P. also acknowledge support from the ANR-ORGAVOLT project and the Euroregion Aquitaine-Euskadi program. M.B. acknowledges support from the Departamento de Educacion of the Basque Government through a Ph.D. grant. P.K. acknowledges financial support
from the Fellows Gipuzkoa program of the Gipuzkoako Foru Aldundia through the FEDER funding scheme of the European Union. J.A. also acknowledges support from Grant 70NANB15H321, “PLASMOQUANTUM”, from the US Department of Commerce (NIST).
Peer Reviewed
2016-09-15T07:40:00Z
2016-09-15T07:40:00Z
2016
2016-09-15T07:40:00Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1021/acsphotonics.5b00609
e-issn: 2330-4022
ACS Photonics 3(2): 269-277 (2016)
http://hdl.handle.net/10261/136769
10.1021/acsphotonics.5b00609
http://dx.doi.org/10.13039/501100001665
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/100000161
http://dx.doi.org/10.13039/501100003086
http://dx.doi.org/10.13039/100000190
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2013-46593-C6-2-P
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2013-41184-P
Preprint
http://dx.doi.org/10.1021/acsphotonics.5b00609
Sí
open
American Chemical Society