2024-03-29T05:36:22Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1773942022-10-11T07:04:11Zcom_10261_46com_10261_3col_10261_299
Geometric frustration in ordered lattices of plasmonic nanoelements
Conde Rubio, Ana
Fraile Rodríguez, Arantxa
Espinha, André
Mihi, Agustín
Perez Murano, Francesc X.
Batlle, Xavier
Labarta, Amilcar
Ministerio de Economía y Competitividad (España)
European Research Council
Inspired by geometrically frustrated magnetic systems, we present the optical response of three cases
of hexagonal lattices of plasmonic nanoelements. All of them were designed using a metal-insulatormetal
configuration to enhance absorption of light, with elements in close proximity to exploit
near-field coupling, and with triangular symmetry to induce frustration of the dipolar polarization in
the gaps between neighboring structures. Both simulations and experimental results demonstrate
that these systems behave as perfect absorbers in the visible and/or the near infrared. Besides, the
numerical study of the time evolution shows that they exhibit a relatively extended time response
over which the system fluctuates between localized and collective modes. It is of particular interest
the echoed excitation of surface lattice resonance modes, which are still present at long times
because of the geometric frustration inherent to the triangular lattice. It is worth noting that the
excitation of collective modes is also enhanced in other types of arrays where dipolar excitations of
the nanoelements are hampered by the symmetry of the array. However, we would like to emphasize
that the enhancement in triangular arrays can be significantly larger because of the inherent geometric
incompatibility of dipolar excitations and three-fold symmetry axes.
2019-03-06T13:23:11Z
2019-03-06T13:23:11Z
2019-03-05
artículo
Scientific Reports 9: 3529 (2019)
2045-2322
http://hdl.handle.net/10261/177394
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100000781
eng
Publisher's version
http://dx.doi.org/10.1038/s41598-019-40117-4
Sí
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2015-68772-P
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2015-0496
info:eu-repo/grantAgreement/EC/H2020/637116
https://creativecommons.org/licenses/by/4.0/
openAccess
Nature Publishing Group