Core-shell metallic alloy nanopillars-in-dielectric hybrid metamaterials with magneto-plasmonic coupling. (December 2021)

• Record Type: Journal Article
• Authors: Huang, Jijie; Phuah, Xin Li; McClintock, Luke Mitchell; Padmanabhan, Prashant; Vikrant, K.S.N.; Wang, Han; Zhang, Di; Wang, Haohan; Lu, Ping; Gao, Xingyao; Sun, Xing; Xu, Xiaoshan; Edwin García, R.; Chen, Hou-Tong; Zhang, Xinghang; Wang, Haiyan
• Is Part Of: Materials today. Volume 51(2021)
• Page Start: 39
• Page End: 47
• Publication Date: 2021-12
• Subjects: Plasmonic nanostructure -- Magnetism -- Core-shell metallic nanopillar -- Nanocomposite thin film -- Optical anisotropy -- Magneto-optical coupling; Materials science -- Periodicals; Metallurgy -- Periodicals; Metal-work -- Periodicals; Biomedical and Dental Materials -- Periodicals; Manufactured Materials -- Periodicals; Metals -- Periodicals; 620.11
• DOI: 10.1016/j.mattod.2021.10.024
• Languages: English
• ISSNs: 1369-7021

Abstract

Graphical abstract: Abstract: Combining plasmonic and magnetic properties, namely magneto-plasmonic coupling, inspires great research interest and the search for magneto-plasmonic nanostructure becomes considerably critical. Here we designed a nanopillar-in-matrix structure with core–shell alloyed nanopillars for both BaTiO3 (BTO)-Au0.5 Co0.5 (AuCo) and BTO-Au0.25 Cu0.25 Co0.25 Ni0.25 (AuCuCoNi) hybrid systems, i.e., ferromagnetic alloy cores (e.g., Co or CoNi) with plasmonic shells (e.g., Au or Au/Cu). These core–shell alloy nanopillars are uniformly embedded into a dielectric BTO matrix to form a vertically aligned nanocomposite (VAN) structure. Both hybrid systems present excellent epitaxial quality and interesting multi-functionality, e.g., high magnetic anisotropy, magneto-optical coupling response, tailorable plasmonic resonance wavelength, tunable hyperbolic properties and strong optical anisotropy. These alloyed nanopillars-in-matrix designs provide enormous potential for complex hybrid material designs with multi-functionality and demonstrate strong interface enabled magneto-plasmonic coupling along with plasmonic and magnetic performance.