Fano plasmonics goes nonlinear

Maxim Sukharev; Elena Drobnyh; Ruth Pachter

doi:https://doi.org/10.1063/5.0109872

Fano plasmonics goes nonlinear

Maxim Sukharev, Elena Drobnyh, Ruth Pachter

Integrative Sciences and Arts, College of (CISA)

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We investigate the process of the second harmonic generation by plasmonic nano-antennas that exhibit Fano-like resonances. A rigorous fully vectorial Maxwell-hydrodynamics approach is employed to directly calculate the second order susceptibilities as a function of the pump frequency, considering a periodic array of nanodolmens comprised of three Au nanorods. The results of the numerical simulations demonstrate a noticeable enhancement of the second harmonic efficiency by the antisymmetric mode. Additionally, a simple analytical model based on two coupled nonlinear oscillators is proposed. It is shown that the second order optical response can be significantly enhanced at the frequency of the antisymmetric normal mode, thus supporting our numerical results.

Original language	English (US)
Article number	134105
Journal	Journal of Chemical Physics
Volume	157
Issue number	13
DOIs	https://doi.org/10.1063/5.0109872
State	Published - Oct 7 2022

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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title = "Fano plasmonics goes nonlinear",

abstract = "We investigate the process of the second harmonic generation by plasmonic nano-antennas that exhibit Fano-like resonances. A rigorous fully vectorial Maxwell-hydrodynamics approach is employed to directly calculate the second order susceptibilities as a function of the pump frequency, considering a periodic array of nanodolmens comprised of three Au nanorods. The results of the numerical simulations demonstrate a noticeable enhancement of the second harmonic efficiency by the antisymmetric mode. Additionally, a simple analytical model based on two coupled nonlinear oscillators is proposed. It is shown that the second order optical response can be significantly enhanced at the frequency of the antisymmetric normal mode, thus supporting our numerical results.",

author = "Maxim Sukharev and Elena Drobnyh and Ruth Pachter",

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AU - Sukharev, Maxim

AU - Drobnyh, Elena

AU - Pachter, Ruth

N1 - Funding Information: This work was supported by the Air Force Office ofz Scientific Research under Grant No. FA9550-22-1-0175. The computational part of the work has been made possible via the Department of Defense High Performance Computing Modernization Program. Publisher Copyright: © 2022 Author(s).

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N2 - We investigate the process of the second harmonic generation by plasmonic nano-antennas that exhibit Fano-like resonances. A rigorous fully vectorial Maxwell-hydrodynamics approach is employed to directly calculate the second order susceptibilities as a function of the pump frequency, considering a periodic array of nanodolmens comprised of three Au nanorods. The results of the numerical simulations demonstrate a noticeable enhancement of the second harmonic efficiency by the antisymmetric mode. Additionally, a simple analytical model based on two coupled nonlinear oscillators is proposed. It is shown that the second order optical response can be significantly enhanced at the frequency of the antisymmetric normal mode, thus supporting our numerical results.

AB - We investigate the process of the second harmonic generation by plasmonic nano-antennas that exhibit Fano-like resonances. A rigorous fully vectorial Maxwell-hydrodynamics approach is employed to directly calculate the second order susceptibilities as a function of the pump frequency, considering a periodic array of nanodolmens comprised of three Au nanorods. The results of the numerical simulations demonstrate a noticeable enhancement of the second harmonic efficiency by the antisymmetric mode. Additionally, a simple analytical model based on two coupled nonlinear oscillators is proposed. It is shown that the second order optical response can be significantly enhanced at the frequency of the antisymmetric normal mode, thus supporting our numerical results.

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Fano plasmonics goes nonlinear

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