Toward Huygens’ sources with dodecahedral plasmonic clusters

Laurent Lermusiaux (1) , Véronique Many (1, 2) , Philippe Barois (2) , Virginie Ponsinet (2) , Serge Ravaine (2) , Etienne Duguet (1) , Mona Tréguer-Delapierre (1) , Alexandre Baron (2)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 CRPP - Centre de Recherche Paul Pascal

The design and chemical synthesis of plasmonic nanoresonators exhibiting a strong magnetic response in the visible is a key requirement to the realization of efficient functional and self-assembled metamaterials. However, novel applications like Huygens’ metasurfaces or mu-near-zero materials require stronger magnetic responses than those currently reported. Our numerical simulations demonstrate that the specific dodecahedral morphology, whereby 12 silver satellites are located on the faces of a nanosized dielectric dodecahedron, provides sufficiently large electric and magnetic dipolar and quadrupolar responses that interfere to produce so-called generalized Huygens’ sources, fulfilling the generalized Kerker condition. Using a multistep colloidal engineering approach, we synthesize highly symmetric plasmonic nanoclusters with a controlled silver satellite size and show that they exhibit a strong forward scattering that may be used in various applications such as metasurfaces or perfect absorbers.

Mots clés: Optical magnetism; Metafluid; Static light scattering; Ag nanoparticle; Meta-atoms

Domaines: Matériaux

Laurent Lermusiaux, Véronique Many, Philippe Barois, Virginie Ponsinet, Serge Ravaine, et al.. Toward Huygens’ sources with dodecahedral plasmonic clusters. Nano Letters, 2021, 21 (5), pp.2046-2052. ⟨10.1021/acs.nanolett.0c04666⟩. ⟨hal-03167125⟩