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Visualizing magnetic domains with terahertz radiation

Research Project

Project/Area Number 15K13330
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Applied materials
Research InstitutionThe University of Tokyo

Principal Investigator

Kida Noriaki  東京大学, 大学院新領域創成科学研究科, 准教授 (30587069)

Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywordsテラヘルツ電磁波 / 磁気ドメイン / テラヘルツ電磁波発生
Outline of Final Research Achievements

We report the terahertz radiations in various polar and ferrimagnetic insulating oxides upon irradiation of a femtosecond laser pulse at room temperature. By the resonant optical excitation of an originally spin-forbidden transitio, we observed the emission of terahertz waves, which is attributable to the magnetic-dipole radiation originating from the light-induced subpicosecond magnetization modulation. By mapping out the emission of the terahertz waves, we successfully visualized the vector images of in-plane magnetic domains in magnetic fields. The terahertz-radiation imaging presented here is useful as a new tool to observe ferro- or ferri-magnetic domains.

Report

(3 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • Research Products

    (10 results)

All 2017 2016 2015

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Acknowledgement Compliant: 1 results) Presentation (9 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results)

  • [Journal Article] Terahertz Radiation by Subpicosecond Magnetization Modulation in the Ferrimagnet LiFe5O82016

    • Author(s)
      Y. Kinoshita, N. Kida, M. Sotome, T. Miyamoto, Y. Iguchi, Y. Onose, and H. Okamoto
    • Journal Title

      ACS Photonics

      Volume: 3 Issue: 7 Pages: 1170-1175

    • DOI

      10.1021/acsphotonics.6b00272

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] ラシュバ型極性半導体BiTeBrにおける円偏光フェムト秒レーザー誘起スピン偏極電流変調によるテラヘルツ電磁波発生2017

    • Author(s)
      木下雄斗, 貴田徳明, 宮本辰也, 加納学, 笹川崇男, 岡本博
    • Organizer
      日本物理学会第72回年次大会
    • Place of Presentation
      大阪大学(大阪府吹田市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] 磁化変調による磁性体からのテラヘルツ電磁波発生とそれを利用した磁気ドメインの可視化2016

    • Author(s)
      貴田徳明
    • Organizer
      テラヘルツ科学の最先端Ⅲ
    • Place of Presentation
      三国観光ホテル(福井県三国市)
    • Year and Date
      2016-11-23
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] フェムト秒レーザー誘起高速磁化変調を利用したフェリ磁性体BaFe12O19における磁化ダイナミクスの観測2016

    • Author(s)
      木下雄斗, 伊藤望, 宮本辰也, 貴田徳明, 徳永祐介, 有馬孝尚, 岡本博
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学(石川県金沢市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] Terahertz radiation by subpicosecond magnetization modulation in ferrimagnets2016

    • Author(s)
      Y. Kinoshita, N. Kida, M. Sotome, N. Ito, T. Miyamoto, T. Terashige, Y. Iguchi, Y. Onose, T. Ito, Y. Tokunaga, T. Arima, H. Okamoto
    • Organizer
      ICMM2016 The 15th International Conference on Molecule-Based Magnets, Sendai International Center
    • Place of Presentation
      Sendai International Center (Sendai Miyagi)
    • Year and Date
      2016-09-04
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] BaFe12O19におけるフェムト秒レーザー誘起高速磁化変調によるテラヘルツ電磁波発生2016

    • Author(s)
      木下雄斗, 伊藤望, 寺重翼, 宮本辰也, 貴田徳明, 徳永祐介, 有馬孝尚, 岡本博
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学 (宮城県仙台市)
    • Year and Date
      2016-03-19
    • Related Report
      2015 Research-status Report
  • [Presentation] テラヘルツ電場によるBiFeO3単結晶の超高速分極変調2016

    • Author(s)
      宮本辰也, 木下雄斗, 山川大路, 森本剛史, 伊藤利充, 岩野薫, 貴田徳明, 岡本博
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学 (宮城県仙台市)
    • Year and Date
      2016-03-19
    • Related Report
      2015 Research-status Report
  • [Presentation] フェムト秒レーザー誘起テラヘルツ電磁波発生を利用したBiFeO3単結晶における強誘電分極ドメインの可視化2016

    • Author(s)
      木下雄斗, 貴田徳明, 宮本辰也, 伊藤利充, 岡本博
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学 (宮城県仙台市)
    • Year and Date
      2016-03-19
    • Related Report
      2015 Research-status Report
  • [Presentation] フェムト秒レーザー誘起高速磁化変調によるテラヘルツ電磁波発生を利用したフェリ磁性体LiFe5O8における磁化ダイナミクスの観測2015

    • Author(s)
      木下雄斗, 貴田徳明, 宮本辰也, 矢田祐之, 井口雄介, 小野瀬佳文, 岡本博
    • Organizer
      日本物理学会2015年秋季大会
    • Place of Presentation
      関西大学 (大阪府吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] Terahertz radiation by ultrafast magnetization modulation in magnetic insulators2015

    • Author(s)
      N. Kida
    • Organizer
      The 3rd International Symposium on Microwave/Terahertz Science and Applications (MTSA 2015) and The 6th International Symposium on Terahertz Nanoscience (TeraNano 6)
    • Place of Presentation
      沖縄科技大 (沖縄県国頭郡)
    • Year and Date
      2015-06-30
    • Related Report
      2015 Research-status Report
    • Invited

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Published: 2015-04-16   Modified: 2018-03-22  

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