Development of the magneto optic lattice with controlled magnetic domain; Application for a solid-state optical deflector

2018 Fiscal Year Final Research Report

• Project/Area Number: 16K21569
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Electronic materials/Electric materials; Device related chemistry
• Research Institution: Tokyo National College of Technology
• Principal Investigator: Mito Shinichiro 東京工業高等専門学校, 電子工学科, 准教授 (10637268)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Keywords: 磁気回折 / 逆磁歪効果 / 磁性ガーネット / 光偏向器 / 光変調器

Outline of Final Research Achievements

We developed the Magneto-optic (MO)lattice with strain controlled magnetic domain. By using the function of the MO lattice, a electrically-controllable solid-state optical deflector was made.
A optimum magnetic garnet film for the optical reflected was fabricated by the developed liquid phase epitaxy furnace. The angle ofthe deflected light from the fabricated film was changed 1 degree with the strain of 300ppm. In addition, diffraction efficiency was also modulated by the stress.

Free Research Field

磁気光学

Academic Significance and Societal Importance of the Research Achievements

磁気回折を用いた光制御に，逆磁歪効果を用いるという新たな手法を提供することができた．また，磁気回折を用いた応用に適した磁性ガーネットの組成を提案することができた．応力を印加した際の磁気回折の変化はこれまで明らかになっておらず，本研究により回折角度，及び回折強度を変化させられるとわかったことには学術的意義があるといえる．また，応力は圧電アクチュエータを用いることで電圧制御できるため，CMOS等との親和性が高く，磁気回折を利用した光制御デバイス実現の助けとなると言え，社会的意義も高いと言える．