Fabrication and Evaluation of waveguide-type Faraday materials using magnetic nanoparticle-dispersed xerogels

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K05015
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26020:Inorganic materials and properties-related
• Research Institution: Shizuoka University
• Principal Investigator: Nakashima Seisuke 静岡大学, 工学部, 准教授 (40462709)
• Co-Investigator(Kenkyū-buntansha): 村井 俊介 京都大学, 工学研究科, 助教 (20378805)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: ファラデー効果 / 磁気光学効果 / 局在表面プラズモン共鳴 / キセロゲル / フェムト秒レーザー / ナノアレイ

Outline of Final Research Achievements

The purpose of this research is to create highly efficient magneto-optic materials for the construction of optical waveguide magneto-optic devices. The following results were obtained with respect to various efforts toward this goal. We deposited magnetic oxide thin films on plasmonic substrates with metal nanoarray structures and showed that the rotation angle enhancement occurs at specific angles satisfying the diffraction condition of array periodicity in the sample angle dependence measurement of the Faraday effect. We also attempted to control the wavelength of localized plasmon resonance by inducing Ag nanoparticles by laser irradiation of a xerogel co-doped with Fe3O4/Au core-shell particles and Ag+ ions. These results are expected to expand the degree of freedom in material selection suitable for waveguide-type micro magneto-optical devices.

Free Research Field

無機材料化学

Academic Significance and Societal Importance of the Research Achievements

本研究では、光導波路型磁気光学素子の構築に向けて高効率な磁気光学材料の創発を目指した。そのための取り組みとして、金属ナノアレイ構造と酸化物磁性薄膜の複合材料において、ファラデー効果の特異なプラズモン増強を実現した。また、コアシェルナノ微粒子に対してフェムト秒レーザー照射を用いてAgナノ微粒子をコアシェル粒子表面に形成させることで、プラズモン共鳴が起こる波長を制御できる知見を得た。以上の成果より、導波型とファラデー素子が組み合わさった新しいデバイスを開発する技術を進展させることにつながると考えられる。