Department of Applied Physics, Center for Modern Physics Technology, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, University of Science and Technology Beijing, Beijing, 100083, China.
Univ. Lille, CNRS, Centrale Lille, ISEN, Univ. Valenciennes, UMR 8520-IEMN-LIA LICS, F-59000, Lille, France.
Sci Rep. 2017 Jun 6;7(1):2888. doi: 10.1038/s41598-017-03241-7.
Magnetoplasmonics, combining magnetic and plasmonic functions, has attracted increasing attention owing to its unique magnetic and optical properties in various nano-architectures. In this work, Ag, CoFeB and ITO layers are fabricated on anodic aluminum oxide (AAO) porous films to form hybrid multi-layered nanoporous thin films by magnetron sputtering deposition process. The designed nanostructure supports localized surface plasmon resonance (LSPR) and tunable magneto-optical (MO) activity, namely, the sign inversion, which can be controlled by AAO porous film geometry (pore diameter and inter-pore spacing) flexibly. The physical mechanism of this special MO phenomena is further analyzed and discussed by the correlation of Kerr rotation and electronic oscillations controlled by the surface plasmon resonance that is related to the nanoporous structure.
磁等离子体学结合了磁性和等离子体功能，由于其在各种纳米结构中具有独特的磁学和光学性质，因此引起了越来越多的关注。在这项工作中，通过磁控溅射沉积工艺在阳极氧化铝（AAO）多孔膜上制备了 Ag、CoFeB 和 ITO 层，以形成混合多层纳米多孔薄膜。所设计的纳米结构支持局域表面等离子体共振（LSPR）和可调谐的磁光（MO）活性，即通过 AAO 多孔膜的几何形状（孔径和孔间间距）灵活控制的符号反转。通过与纳米多孔结构相关的表面等离子体共振控制的 Kerr 旋转和电子振荡的相关性，进一步分析和讨论了这种特殊 MO 现象的物理机制。
