Subnanometric Plasmonics
Keywords:
plasmons, metallic nanoparticles, nanocavities, nanotweezers, tunneling in nanosystemsAbstract
Interaction of light with metallic nanoparticles can be greatly enhanced if the incident electromagnetic wave is at resonance with collective electron excitations, which are called plasmons. Undoubtedly driven by the wide range of potential applications, plasmonics now is a flourishing field of fundamental and applied research. In particular, the possibility of actively controlling the plasmonic response at very short time scales. In this paper it is shown how to use the great near field enhancement in several nanostructures in which plasmonic nanocavities are formed, dimers with subnanometric distances between them and core-shell systems (nanomatryushkas) with decreasing separations up to less than 1 nm. At these distances we cannot describe neither the near field nor the far field classically and need to introduce quantum mechanics to explain tunneling through the narrow gaps as has been reported. The quantum corrected model (QCM, that describes the dielectric interfase as an effective medium which turns out conductive as the gaps become too small) (ESTEBAN et al., 2012) offers an accurate description of this effect and allows us to open a new development of devices that can be applied in Raman Spectroscopy.
References
ALVAREZ-PUEBLA, R., L. M. Liz-Marzán, F. J. García De Abajo, “Light concentration at the nanometer scale”, J. Phys. Chem. Lett., 2010, Núm. 1, pp. 2428.
ARIAS J.C. y A. Camacho, “Surface plasmon resonances of a few particle linear array”, Journal of Electromagnetic Analysis and Applications, 2011, Vol. 3, Núm. 11,458.
BERTHELOT J., S. et al., “Three-dimensional manipulation with scanning near-field optical nanotweezers”, Nature Nanotechnology, 2014, Núm. 4, 295-299.
CAMACHO B., Angela S., “Atrapando plasmones”, MOMENTO, Revista de Física, 2015, (ISSN: 0121-4470), Núm. 49E, pp. 75-85.
ESTEBAN, R., A. G. Borisov, P. Nordlander, J. Aizpurua, “Bridging quantum and classical plasmonics with a quantum-corrected model”, Nat. Commun., 2012, Núm. 3, p. 825.
HULST, Niek F., “Nanophotonics: Plasmon quantum limit exposed”, Nature Nanotech., 2012, Núm. 7, pp. 775.
JUAN, Mathieu L., Maurizio Righini and Roman Quidant, “Plasmon nano-optical tweezers”, Nature Photonics, June 2011, Núm. 5, pp. 349.
KRAVETS, V. G. et al., “Singular phase nano-optics in plasmonic metamaterials for label-free single-molecule detection”, Nat. Mater., 2013, Vol. 12, Núm. 4, pp. 304-309.
KULKARNI, V. et al., “Quantum plasmonics: optical properties of nanomatryushkas”, Nano Lett., 2013, Núm. 13, pp. 5873.
MARINICA, D. C., A. K. Kazansky, P. Nordlander, J. Aizpurua, and A. G. Borisov, “QuantumPlasmonics: Nonlinear Effects in the Field Enhancement of a Plasmonic Nanoparticle Dimer”, Nano Lett., 2012, Núm. 12, pp. 1333.
SAVAGE, K. J. et al., J. J., “Revealing the quantum regime in tunnelling plasmonics”, Nature, 2012, Vol. 491, núm. 7425, pp. 574-577.
SCHULLER J. A., et al., “Plasmonic for extreme light concentration and manipulation”, Nature Materials, 2010, núm. 9, pp. 193204.
SCHOLL, J. A., A. García-Etxarri, A.L. Koh, J. A. Dionne, “Observation of quantum tunneling between two plasmonic nanoparticles”, Nano Lett., 2013, Vol. 13, núm. 2, pp. 564-569.
ZAPATA, Mario, Ángela S. Camacho Beltrán, Andrei G. Borisov, Javier Aizpurua, “Quantum effects in the optical response of extended plasmonic gaps: validation of the quantum corrected model in core-shell nanomatryushkas”, Optics Express, 2015, Vol. 23, Núm. 6, pp. 8134-8149.
ZUOLAGA J., E. Prodan y P. Nordlander, “Quantum description of the plasmon resonances of a nanoparticle dimer”, Nano Lett., 2009, Núm. 9, p. 887.
Published
Issue
Section
License
Copyright (c) 2017 Revista Digital Universitaria
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Revista Digital Universitaria es editada por la Universidad Nacional Autónoma de México se distribuye bajo una Licencia Creative Commons Atribución-NoComercial 4.0 Internacional. Basada en una obra en http://revista.unam.mx/.
