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Less Is More: Enhancement of Second-Harmonic Generation from Metasurfaces by Reduced Nanoparticle Density

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Less Is More : Enhancement of Second-Harmonic Generation from Metasurfaces by Reduced Nanoparticle Density. / Czaplicki, Robert; Kiviniemi, Antti; Huttunen, Mikko J.; Zang, Xiaorun; Stolt, Timo; Vartiainen, Ismo; Butet, Jérémy; Kuittinen, Markku; Martin, Olivier J.F.; Kauranen, Martti.

In: Nano Letters, Vol. 18, No. 12, 12.12.2018, p. 7709-7714.

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Czaplicki, Robert ; Kiviniemi, Antti ; Huttunen, Mikko J. ; Zang, Xiaorun ; Stolt, Timo ; Vartiainen, Ismo ; Butet, Jérémy ; Kuittinen, Markku ; Martin, Olivier J.F. ; Kauranen, Martti. / Less Is More : Enhancement of Second-Harmonic Generation from Metasurfaces by Reduced Nanoparticle Density. In: Nano Letters. 2018 ; Vol. 18, No. 12. pp. 7709-7714.

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@article{8c1b3a27b12b4af3968d6d3bed83d84e,
title = "Less Is More: Enhancement of Second-Harmonic Generation from Metasurfaces by Reduced Nanoparticle Density",
abstract = "We investigate optical second-harmonic generation (SHG) from metasurfaces where noncentrosymmetric V-shaped gold nanoparticles are ordered into regular array configurations. In contrast to expectations, a substantial enhancement of the SHG signal is observed when the number density of the particles in the array is reduced. More specifically, by halving the number density, we obtain over 5-fold enhancement in SHG intensity. This striking result is attributed to favorable interparticle interactions mediated by the lattice, where surface-lattice resonances lead to spectral narrowing of the plasmon resonances. Importantly, however, the results cannot be explained by the improved quality of the plasmon resonance alone. Instead, the lattice interactions also lead to further enhancement of the local fields at the particles. The experimental observations agree very well with results obtained from numerical simulations including lattice interactions.",
keywords = "interparticle interactions, Metal nanoparticles, nonlinear optics, plasmonic resonances, second-harmonic generation, surface-lattice resonances",
author = "Robert Czaplicki and Antti Kiviniemi and Huttunen, {Mikko J.} and Xiaorun Zang and Timo Stolt and Ismo Vartiainen and J{\'e}r{\'e}my Butet and Markku Kuittinen and Martin, {Olivier J.F.} and Martti Kauranen",
year = "2018",
month = "12",
day = "12",
doi = "10.1021/acs.nanolett.8b03378",
language = "English",
volume = "18",
pages = "7709--7714",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "12",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Less Is More

T2 - Enhancement of Second-Harmonic Generation from Metasurfaces by Reduced Nanoparticle Density

AU - Czaplicki, Robert

AU - Kiviniemi, Antti

AU - Huttunen, Mikko J.

AU - Zang, Xiaorun

AU - Stolt, Timo

AU - Vartiainen, Ismo

AU - Butet, Jérémy

AU - Kuittinen, Markku

AU - Martin, Olivier J.F.

AU - Kauranen, Martti

PY - 2018/12/12

Y1 - 2018/12/12

N2 - We investigate optical second-harmonic generation (SHG) from metasurfaces where noncentrosymmetric V-shaped gold nanoparticles are ordered into regular array configurations. In contrast to expectations, a substantial enhancement of the SHG signal is observed when the number density of the particles in the array is reduced. More specifically, by halving the number density, we obtain over 5-fold enhancement in SHG intensity. This striking result is attributed to favorable interparticle interactions mediated by the lattice, where surface-lattice resonances lead to spectral narrowing of the plasmon resonances. Importantly, however, the results cannot be explained by the improved quality of the plasmon resonance alone. Instead, the lattice interactions also lead to further enhancement of the local fields at the particles. The experimental observations agree very well with results obtained from numerical simulations including lattice interactions.

AB - We investigate optical second-harmonic generation (SHG) from metasurfaces where noncentrosymmetric V-shaped gold nanoparticles are ordered into regular array configurations. In contrast to expectations, a substantial enhancement of the SHG signal is observed when the number density of the particles in the array is reduced. More specifically, by halving the number density, we obtain over 5-fold enhancement in SHG intensity. This striking result is attributed to favorable interparticle interactions mediated by the lattice, where surface-lattice resonances lead to spectral narrowing of the plasmon resonances. Importantly, however, the results cannot be explained by the improved quality of the plasmon resonance alone. Instead, the lattice interactions also lead to further enhancement of the local fields at the particles. The experimental observations agree very well with results obtained from numerical simulations including lattice interactions.

KW - interparticle interactions

KW - Metal nanoparticles

KW - nonlinear optics

KW - plasmonic resonances

KW - second-harmonic generation

KW - surface-lattice resonances

UR - https://arxiv.org/abs/1808.06439

U2 - 10.1021/acs.nanolett.8b03378

DO - 10.1021/acs.nanolett.8b03378

M3 - Article

VL - 18

SP - 7709

EP - 7714

JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

IS - 12

ER -