%AWang, Xuejing [School of Materials Engineering Purdue University West Lafayette IN 47907 USA]%AJian, Jie [School of Materials Engineering Purdue University West Lafayette IN 47907 USA]%AWang, Haohan [Department of Physics and Astronomy University of Nebraska‐Lincoln Lincoln NE 68588 USA]%ALiu, Juncheng [School of Materials Engineering Purdue University West Lafayette IN 47907 USA]%APachaury, Yash [School of Materials Engineering Purdue University West Lafayette IN 47907 USA]%ALu, Ping [Sandia National Laboratories Albuquerque NM 87185 USA]%ARutherford, Bethany [School of Materials Engineering Purdue University West Lafayette IN 47907 USA]%AGao, Xingyao [School of Materials Engineering Purdue University West Lafayette IN 47907 USA]%AXu, Xiaoshan [Department of Physics and Astronomy University of Nebraska‐Lincoln Lincoln NE 68588 USA]%AEl‐Azab, Anter [School of Materials Engineering Purdue University West Lafayette IN 47907 USA]%AZhang, Xinghang [School of Materials Engineering Purdue University West Lafayette IN 47907 USA]%AWang, Haiyan [School of Materials Engineering Purdue University West Lafayette IN 47907 USA, School of Electrical and Computer Engineering Purdue University West Lafayette IN 47907 USA]%BJournal Name: Small; Journal Volume: 17; Journal Issue: 5; Related Information: CHORUS Timestamp: 2023-08-28 07:13:50 %D2021%IWiley Blackwell (John Wiley & Sons) %JJournal Name: Small; Journal Volume: 17; Journal Issue: 5; Related Information: CHORUS Timestamp: 2023-08-28 07:13:50 %K %MOSTI ID: 10362254 %PMedium: X %TNitride‐Oxide‐Metal Heterostructure with Self‐Assembled Core–Shell Nanopillar Arrays: Effect of Ordering on Magneto‐Optical Properties %XAbstract

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.

%0Journal Article