Nitride-Oxide-Metal Heterostructure with Self-Assembled Core-Shell Nanopillar Arrays: Effect of Ordering on Magneto-Optical Properties

被引：35

作者：

Wang, Xuejing ^{[1
]}

Jian, Jie ^{[1
]}

Wang, Haohan ^{[2
]}

Liu, Juncheng ^{[1
]}

Pachaury, Yash ^{[1
]}

Lu, Ping ^{[3
]}

Rutherford, Bethany X. ^{[1
]}

Gao, Xingyao ^{[1
]}

Xu, Xiaoshan ^{[2
]}

El-Azab, Anter ^{[1
]}

Zhang, Xinghang ^{[1
]}

Wang, Haiyan ^{[1
,4
]}

机构：

[1] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA

[2] Univ Nebraska Lincoln, Dept Phys & Astron, Lincoln, NE 68588 USA

[3] Sandia Natl Labs, Albuquerque, NM 87185 USA

[4] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA

来源：

SMALL | 2021年 / 17卷 / 05期

基金：

美国国家科学基金会;

关键词：

anisotropy; core-shell heterostructure; Kerr rotation; magneto-optical coupling; ordered nanopillars; MICROSTRUCTURE RECONSTRUCTIONS; METAMATERIALS; NANOSTRUCTURES; NANOWIRES; DIFFUSION; TIN;

D O I：

10.1002/smll.202007222

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Magneto-optical (MO) coupling incorporates photon-induced change of magnetic polarization that can be adopted in ultrafast switching, optical isolators, mode convertors, and optical data storage components for advanced optical integrated circuits. However, integrating plasmonic, magnetic, and dielectric properties in one single material system poses challenges since one natural material can hardly possess all these functionalities. Here, co-deposition of a three-phase heterostructure composed of a durable conductive nitride matrix with embedded core-shell vertically aligned nanopillars, is demonstrated. The unique coupling between ferromagnetic NiO core and atomically sharp plasmonic Au shell enables strong MO activity out-of-plane at room temperature. Further, a template growth process is applied, which significantly enhances the ordering of the nanopillar array. The ordered nanostructure offers two schemes of spin polarization which result in stronger antisymmetry of Kerr rotation. The presented complex hybrid metamaterial platform with strong magnetic and optical anisotropies is promising for tunable and modulated all-optical-based nanodevices.

引用

页数：9