期刊
NANO LETTERS
卷 21, 期 5, 页码 2046-2052出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c04666
关键词
Optical magnetism; Metafluid; Static light scattering; Ag nanoparticle; Meta-atoms
类别
资金
- LabEx AMADEus [ANR-10-LABX-42]
- IdEx Bordeaux, i.e., the Investissements d'Avenir program of the French government [ANR-10-IDEX-03-02]
The study focuses on the design and chemical synthesis of plasmonic nanoresonators with a strong magnetic response in the visible range, demonstrating the effectiveness of a novel nanoscale structure in numerical simulations.
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.
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