Core-shell metallic alloy nanopillars-in-dielectric hybrid metamaterials with magneto-plasmonic coupling
Core-shell metallic alloy nanopillars-in-dielectric hybrid metamaterials with magneto-plasmonic coupling
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DOI：
10.1016/j.mattod.2021.10.024
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发表时间：
2021-11
期刊：
影响因子：
24.2
通讯作者：
Jijie Huang;X. L. Phuah;L. McClintock;P. Padmanabhan;K. Vikrant;Han Wang;Di Zhang;Haohan Wang
中科院分区：
文献类型：
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作者：
Jijie Huang;X. L. Phuah;L. McClintock;P. Padmanabhan;K. Vikrant;Han Wang;Di Zhang;Haohan Wang
结合等离子体和磁性，即磁等离子体耦合，激发了人们极大的研究兴趣，并且对磁等离子体纳米结构的研究变得相当重要。在这里，我们为 BaTiO3(BTO)-Au0.5Co0.5(AuCo) 和 BTO-Au0.25Cu0.25Co0.25Ni0.25(AuCuCoNi) 混合系统设计了一种具有核壳合金纳米柱的纳米柱基体结构，即具有等离子体壳（例如 Au 或 CoNi）的铁磁合金核（例如 Co 或 CoNi）。金/铜）。这些核壳合金纳米柱均匀嵌入介电 BTO 基体中，形成垂直排列的纳米复合材料 (VAN) 结构。两种混合系统都具有优异的外延质量和有趣的多功能性，例如高磁各向异性、磁光耦合响应、可定制的等离子体共振波长、可调谐的双曲特性和强光学各向异性。这些合金纳米柱基体设计为具有多功能的复杂混合材料设计提供了巨大的潜力，并展示了强大的界面支持磁等离子体耦合以及等离子体和磁性性能。
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)-Au0.5Co0.5(AuCo) and BTO-Au0.25Cu0.25Co0.25Ni0.25(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.