Huang Jijie, Wang Han, Qi Zhimin, Lu Ping, Zhang Di, Zhang Bruce, He Zihao, Wang Haiyan
School of Materials, Sun Yat-sen University, Guangzhou, Guangdong 510275, China.
School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, United States.
Nano Lett. 2021 Jan 27;21(2):1032-1039. doi: 10.1021/acs.nanolett.0c04213. Epub 2021 Jan 6.
Searching for multifunctional materials with tunable magnetic and optical properties has been a critical task toward the implementation of future integrated optical devices. Vertically aligned nanocomposite (VAN) thin films provide a unique platform for multifunctional material designs. Here, a new metal-oxide VAN has been designed with plasmonic Au nanopillars embedded in a ferromagnetic LaSrMnO (LSMO) matrix. Such Au-LSMO nanocomposite presents intriguing plasmon resonance in the visible range and magnetic anisotropy property, which are functionalized by the Au and LSMO phase, respectively. Furthermore, the vertically aligned nanostructure of metal and dielectric oxide results in the hyperbolic property for near-field electromagnetic wave manipulation. Such optical and magnetic response could be further tailored by tuning the composition of Au and LSMO phases.
寻找具有可调磁光特性的多功能材料一直是实现未来集成光学器件的关键任务。垂直排列的纳米复合材料（VAN）薄膜为多功能材料设计提供了一个独特的平台。在此，设计了一种新型金属氧化物VAN，其中等离子体金纳米柱嵌入铁磁LaSrMnO（LSMO）基质中。这种Au-LSMO纳米复合材料在可见光范围内呈现出有趣的等离子体共振和磁各向异性特性，分别由金和LSMO相实现功能化。此外，金属和介电氧化物的垂直排列纳米结构导致了用于近场电磁波操纵的双曲线特性。通过调整金和LSMO相的组成，可以进一步调整这种光学和磁响应。
