Observing the influence of second-harmonic tangential surface source in gold plasmonic nanostructures

The origin of the second harmonic generation (SHG) from plasmonic structures remains a subject of debate. Here, we investigate SHG from gold plasmonic nanostructures by scanning nanostructures at the single-particle level to acquire two-dimensional (2D) SHG maps which are qualitatively and quantitatively compared with numerically simulated SHG maps. This approach allows us to discriminate the role played by the surface and bulk contributions to SHG. Our findings reveal that the tangential surface source contribution, often neglected in the literature, plays a dominant role and is affected by surface roughness. This is evident when comparing the SHG maps obtained from identically sized gold nanoparticles that are fabricated using physical and chemical techniques. Additionally, the normal surface source is not found to significantly impact SHG in these configurations.

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Publication Details

Journal
Physical review. A/Physical review, A
Published
2025-02-21
DOI
https://doi.org/10.1103/physreva.111.023520
Citations
2
Primary Topic
Plasmonic and Surface Plasmon Research
Type
article
Field-Weighted Citation Impact
1.35

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article

Observing the influence of second-harmonic tangential surface source in gold plasmonic nanostructures

Erik Dujardin, Sanro Mathew, Gilles Nogues, Laureen Moreaud et al.
2 citations
Physical review. A/Physical review, A
Plasmonic and Surface Plasmon Research
1.35
article

Observing the influence of second-harmonic tangential surface source in gold plasmonic nanostructures

Erik Dujardin, Sanro Mathew, Gilles Nogues, Laureen Moreaud, Maëliss Ethis de Corny, Nicolas Chauvet, Guillaume Bachelier
article en
2 citations

Abstract

The origin of the second harmonic generation (SHG) from plasmonic structures remains a subject of debate. Here, we investigate SHG from gold plasmonic nanostructures by scanning nanostructures at the single-particle level to acquire two-dimensional (2D) SHG maps which are qualitatively and quantitatively compared with numerically simulated SHG maps. This approach allows us to discriminate the role played by the surface and bulk contributions to SHG. Our findings reveal that the tangential surface source contribution, often neglected in the literature, plays a dominant role and is affected by surface roughness. This is evident when comparing the SHG maps obtained from identically sized gold nanoparticles that are fabricated using physical and chemical techniques. Additionally, the normal surface source is not found to significantly impact SHG in these configurations.

Physical review. A/Physical review, AVol. 111(2)
Institut polytechnique de Grenoble (FR), Centre National de la Recherche Scientifique (FR), Université de Bourgogne (FR), Université Fédérale de Toulouse Midi-Pyrénées (FR), Centre d’Élaboration de Matériaux et d’Études Structurales (FR), Institut Néel (FR), Institut des langues et cultures d'Europe, Amérique, Afrique, Asie et Australie (FR), Université Grenoble Alpes (FR)
Université Grenoble Alpes, Agence Nationale de la Recherche
Sustainable cities and communities
Openalex Percentile: Top 22%
Plasmonic and Surface Plasmon Research
1.35
DOIOpen Access PDFOpenAlex
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Observing the influence of second-harmonic tangential surface source in gold plasmonic nanostructures — Erik Dujardin, Sanro Mathew, et al. · Physical review. A/Physical review, A (2025) | TGRS Research Map | TGRS