Beyond Geometrical Symmetry: Revealing Near-Field Optical Chirality on Achiral Gold Nanoparticles under Linear Polarization Excitation
, defined from the loss of mirror symmetry of the polymer with respect to the three mirror planes of the nanotriangle and evaluated from both SEM images and FDTD simulations. Near-field dissymmetry maps derived from simulations and AFM topographies further resolve the redistribution of chiral hot spots. By jointly tuning polarization and wavelength, we reveal a controllable transition between achiral and chiral polymer configurations correlated with the modal composition of the plasmonic response (dipolar versus edge-dominated higher-order modes). These results establish a practical route to engineer and permanently record polarization-tunable planar dissymmetry in achiral nanoantennas, with implications for chiral sensing, enantioselective photochemistry, and nanophotonic devices.
Authors
- Jesús Giráldez‐Martínez (ORCID: https://orcid.org/0009-0003-0902-9811)
- Bin Wei (ORCID: https://orcid.org/0000-0003-4157-2737)
- Baozhong Deng (ORCID: https://orcid.org/0000-0001-9322-7199)
- Tao Xu (ORCID: https://orcid.org/0000-0001-9527-3834)
- Sylvie Marguet (ORCID: https://orcid.org/0000-0002-8670-1320)
- Davy Gérard (ORCID: https://orcid.org/0000-0003-4789-9888)
- Ali Issa
- Safi Jradi (ORCID: https://orcid.org/0000-0003-1712-8986)
- Lucas V. Besteiro (ORCID: https://orcid.org/0000-0001-7356-7719)
- Renaud Bachelot (ORCID: https://orcid.org/0000-0003-1847-5787)
- Thinhinane Aoudjit
- Alexander Govorov
- Minyu Chen
- Yuqing Zhao
Institutions
- Shanghai University (CN)
- Centre National de la Recherche Scientifique (FR)
- European Union (BE)
- Université de Technologie de Troyes (FR)
- Université Paris-Saclay (FR)
- Ohio University (US)
- Nanomaterials Research (United States) (US)
- Microelectronica (Romania) (RO)
- Nizhny Novgorod Institute of Management and Business (RU)
- Universidade de Vigo (ES)
- EU Business School, Geneva (CH)
Publication Details
- Journal
- ACS Nano
- Published
- 2026-04-14
- DOI
- https://doi.org/10.1021/acsnano.5c22237
- Primary Topic
- Metamaterials and Metasurfaces Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Ministerio de Ciencia, Innovación y Universidades
- Agence Nationale de la Recherche
- National Natural Science Foundation of China
- Ministère de l'Enseignement Supérieur et de la Recherche Scientifique
- Conseil régional du Grand Est
- European Regional Development Fund
- NextGenerationEU