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Near-Field Localization of Single Au Cubes: A Group Theory Description

Sarra Mitiche 1 Sylvie Marguet 2 Fabrice Charra 1 Ludovic Douillard 1, * 
* Corresponding author
1 LEPO - Laboratoire d'Electronique et nanoPhotonique Organique
SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay
2 LEDNA - Laboratoire Edifices Nanométriques
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
Abstract : A simple group theory approach is proposed to predict the charge distribution of low order localized surface plasmon resonances (LSPRs) of finite metallic particles of basic geometries. As an illustration, the case of randomly oriented Au colloidal particles of cubic C$_{4v}$ symmetry excited at dipolar resonance is presented. The symmetry approach is confirmed by numerical simulations carried out by the $boundary$ $element$ $method$. Experimental validation is achieved by high-resolution subwavelength near-field mapping conducted by $photoemission$ $electron$ $microscopy$.
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Sarra Mitiche, Sylvie Marguet, Fabrice Charra, Ludovic Douillard. Near-Field Localization of Single Au Cubes: A Group Theory Description. Journal of Physical Chemistry C, American Chemical Society, 2017, 121, pp.4517 - 4523. ⟨10.1021/acs.jpcc.6b10585⟩. ⟨cea-01507472⟩



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