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Volume 11
Issue 9
10.3390/photonics11090789
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Gold Nanoparticles at a Liquid Interface: Towards a Soft Nonlinear Metasurface

by
Delphine Schaming
1,
Anthony Maurice
2,
Frédéric Gumy
3,
Micheál D. Scanlon
4,
Christian Jonin
5,
Hubert H. Girault
3 and
Pierre-François Brevet
2,*
1
ITODYS, UMR 7086 CNRS, Université Paris Cité, 75013 Paris, France
2
Institut Lumière Matière, UMR 5306 CNRS, Université Claude Bernard Lyon 1, CEDEX, 69622 Villeurbanne, France
3
Institute of Chemical Science and Engineering, Station 6, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
4
The Bernal Institute and Department of Chemical Sciences, University of Limerick (UL), V94 T9PX Limerick, Ireland
5
Laboratoire Charles Coulomb, UMR 5221 CNRS, Université Montpellier, CEDEX 5, 34095 Montpellier, France
*
Author to whom correspondence should be addressed.
Photonics 2024, 11(9), 789; https://doi.org/10.3390/photonics11090789 (registering DOI)
Submission received: 9 July 2024 / Revised: 29 July 2024 / Accepted: 21 August 2024 / Published: 23 August 2024
(This article belongs to the Special Issue Recent Advances in Nonlinear Optics: From Fundamentals to Applications)
Versions Notes

Abstract

Optical second-harmonic generation (SHG) is achieved using adsorbed gold nanoparticles (AuNPs) with an average diameter of 16 nm at the aqueous solution–air interface in reflection. A detailed analysis of the depth profile of the SHG intensity detected shows that two contributions appear in the overall signal, one arising from the aqueous solution–air interface that is sensitive to the AuNP surface excess and one arising from the bulk aqueous phase. The latter is an incoherent signal also known as hyper-Rayleigh scattering (HRS). The results agree with those of an analysis involving Gaussian beam propagation optics and a Langmuir-like isotherm. Discrepancies are revealed for the largest AuNP concentrations used and indicate a new route for the design of soft metasurfaces.
Keywords: metasurfaces; second-harmonic generation; liquid interfaces; gold nanoparticles metasurfaces; second-harmonic generation; liquid interfaces; gold nanoparticles

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MDPI and ACS Style

Schaming, D.; Maurice, A.; Gumy, F.; Scanlon, M.D.; Jonin, C.; Girault, H.H.; Brevet, P.-F. Gold Nanoparticles at a Liquid Interface: Towards a Soft Nonlinear Metasurface. Photonics 2024, 11, 789. https://doi.org/10.3390/photonics11090789

AMA Style

Schaming D, Maurice A, Gumy F, Scanlon MD, Jonin C, Girault HH, Brevet P-F. Gold Nanoparticles at a Liquid Interface: Towards a Soft Nonlinear Metasurface. Photonics. 2024; 11(9):789. https://doi.org/10.3390/photonics11090789

Chicago/Turabian Style

Schaming, Delphine, Anthony Maurice, Frédéric Gumy, Micheál D. Scanlon, Christian Jonin, Hubert H. Girault, and Pierre-François Brevet. 2024. "Gold Nanoparticles at a Liquid Interface: Towards a Soft Nonlinear Metasurface" Photonics 11, no. 9: 789. https://doi.org/10.3390/photonics11090789

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