Development of magnetic metamaterials and creation of innovative opto-spintronic functionalities

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H04649
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Medium-sized Section 29:Applied condensed matter physics and related fields
• Research Institution: Tohoku University
• Principal Investigator: Matsubara Masakazu 東北大学, 理学研究科, 准教授 (50450648)
• Project Period (FY): 2021-04-05 – 2024-03-31
• Keywords: 光スピントロニクス / スピン流 / 磁性体メタマテリアル

Outline of Final Research Achievements

In spintronics, which has attracted much attention in recent years, many of its functions are driven by “spin currents”, which are the spin version of electric currents. Therefore, there is an urgent need to develop innovative technologies for generating and controlling spin currents. In this study, by developing magnetic metamaterials with artificially manipulated nanoscale symmetry, we have pioneered a new principle to fully control the propagation direction and magnitude of spin currents at room temperature by the polarization state of light pulses.

Free Research Field

光物性、光スピントロニクス

Academic Significance and Societal Importance of the Research Achievements

本研究で得られた結果は、スピントロニクス技術の根幹を成すスピン流の生成・制御に対して、ナノテクノロジーを用いた「物質の対称性の人工操作」により、多くの既存物質をも機能化する普遍的な新原理・新機能を開拓するモデルとなるものであり、次世代のスピントロニクスデバイス設計の自由度の飛躍的な向上が期待される。