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Twin formation mechanism of strontium tetraborate and development of vacuum-UV laser light source

Research Project

Project/Area Number 15K14174
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Material processing/Microstructural control engineering
Research InstitutionTohoku University

Principal Investigator

Maeda Kensaku  東北大学, 金属材料研究所, 助教 (40634564)

Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords双晶境界 / ホウ酸塩結晶 / 分極反転 / 擬似位相整合 / 結晶成長 / 固液界面
Outline of Final Research Achievements

Strontium tetraborate and lithium tetraborate are nonlinear optical crystals and transparent to vacuum-UV light. When periodically-poled structure of those crystals is realized, it will function as a quasi-phase-matching device for vacuum-UV light source. Conventional quasi-phase-matching structure is fabricated by applying external electric field to ferroelectric crystal, however, ferroelectric oxide crystals are opaque to vacuum-UV. In this research, instead of polarization of ferroelectric, twin formation of non-ferroelectric borate crystal is used. Periodically-twinned borate crystals are also expected to work as a quasi-phase-matching device. Especially, I reviewed twin formation mechanism of strontium tetraborate and lithium tetraborate.

Report

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

    (7 results)

All 2016 2015 Other

All Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results) Remarks (1 results)

  • [Presentation] Twinned borate crystal growth on curved crystal/liquid interface2016

    • Author(s)
      K. Maeda, T. Kaji, S. Uda, K. Fujiwara, Y. Oyama
    • Organizer
      The 18th International Conference on Crystal Growth and Epitaxy (ICCGE-18)
    • Place of Presentation
      愛知県名古屋市
    • Year and Date
      2016-08-03
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] abrication of periodically-twinned borate crystal for quasi-phase-matching2016

    • Author(s)
      Kensaku Maeda, Kozo Fujiwara, Satoshi Uda
    • Organizer
      The 10th Asia-Pacific Laser Symposium (APLS 2016)
    • Place of Presentation
      Jeju, Korea
    • Year and Date
      2016-05-11
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 四ホウ酸リチウム周期双晶による擬似位相整合2016

    • Author(s)
      前田健作、宇田聡、藤原航三、小山裕
    • Organizer
      レーザー学会学術講演会第36回年次大会
    • Place of Presentation
      名城大学 天白キャンパス、愛知県名古屋市
    • Year and Date
      2016-01-09
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] 四ホウ酸リチウムの双晶界面形成過程2015

    • Author(s)
      前田健作、加地剛史、宇田聡、藤原航三、小山裕
    • Organizer
      第45回結晶成長国内会議 (NCCG-45)
    • Place of Presentation
      北海道大学学術交流会館、北海道札幌市
    • Year and Date
      2015-10-19
    • Related Report
      2015 Research-status Report
  • [Presentation] 四ホウ酸リチウム双晶結晶の融液成長過程2015

    • Author(s)
      前田健作、加地剛史、宇田聡、藤原航三、小山裕
    • Organizer
      日本金属学会2015年秋期公演大会
    • Place of Presentation
      九州大学 伊都キャンパス、福岡県福岡市
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] 四ホウ酸リチウムの種子結晶加工による周期双晶の作製2015

    • Author(s)
      前田健作、加地剛史、宇田聡、藤原航三、小山裕
    • Organizer
      レーザー学会第476回研究会「高機能固体レーザーとその応用」
    • Place of Presentation
      ホテル阪急エキスポパーク、大阪府吹田市
    • Year and Date
      2015-07-17
    • Related Report
      2015 Research-status Report
  • [Remarks] 藤原研究室

    • URL

      http://www.xtalphys.imr.tohoku.ac.jp/

    • Related Report
      2016 Annual Research Report

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

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