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Formation of multiple self-trapped excitons in oxides with low dimensional photonic structures under extra UV excitation

Research Project

Project/Area Number 26630301
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Inorganic materials/Physical properties
Research InstitutionAkita University

Principal Investigator

Kodama Nobuhiro  秋田大学, 理工学研究科, 教授 (90282152)

Research Collaborator Takahashi Tomoko  秋田大学, 大学院理工学研究科技術部, 技術専門員
Kudo Mizuki  秋田大学, 大学院工学資源学研究科, 大学院生
Abe Akarii  秋田大学, 大学院工学資源学研究科, 大学院生
Sakashita Tomomi  秋田大学, 大学院工学資源学研究科, 大学院生
Kubota Hisanori  秋田大学, 大学院理工学研究科, 大学院生
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords真空紫外分光 / 自己束縛励起子 / 固有発光 / 量子カッティング / レーザーアブレーション / フェムト秒レーザーアブレーション / フォトニック結晶
Outline of Final Research Achievements

We found that there is a significant correlation between intrinsic emission bands from self-trapped excitons(STEs) upon extra UV excitation and the number of nonequivalent borate anion groups in some orthoborates.The number of emission bands coincides with the number of nonequivalent borate anion groups. Multiple STEs are produced from one absorbed photon when excited by photons with energies greater than or equal to twice the band gap energy.
We fabricated hole arrays in Li/Sr borate crystals and glasses with anion networks, and in a layered aluminosilicate by single-pulse femtosecond laser ablation toward realizing photonic crystals.We found morphological changes in borate crystals and glasses.The SEM images reveal the formation of circular holesin the borate glasses and aluminosilicate, whereas subwvelength tetragonal or polyhedral nanoholes were formed on the borate crystals.When using circular polarized pulse,the hole rotates about the beam axis upon linear polarized irradiation.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (12 results)

All 2016 2015 2014

All Journal Article (4 results) (of which Open Access: 3 results) Presentation (8 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] Material dependence of multiple luminescence from self-trapped excitons in orthoborates with complex oxoanions upon vacuum UV excitation2016

    • Author(s)
      Nobuhiro Kodama
    • Journal Title

      UVSOR Activity Report

      Volume: 43 Pages: 53-53

    • Related Report
      2016 Annual Research Report
    • Open Access
  • [Journal Article] フェムト秒レーザーアブレーションで形成されたホウ酸塩ガラス及びアルミノケイ酸塩表面のナノホールのモルフォロジー変化2016

    • Author(s)
      小玉 展宏
    • Journal Title

      接合科学共同利用・共同研究拠点共同研究報告書

      Volume: 2015 Pages: 66-67

    • Related Report
      2016 Annual Research Report
    • Open Access
  • [Journal Article] Temperature dependence of self-tapped exciton and energy transfer in binary rare-earth borates upon vacuum UV excitation2015

    • Author(s)
      Nobuhiro Kodama
    • Journal Title

      UVSOR Activity Report

      Volume: 42 Pages: 58-58

    • Related Report
      2015 Research-status Report
    • Open Access
  • [Journal Article] Temperature dependence of persistent phosohorescence in Eu2+-doped Ba3SiO52014

    • Author(s)
      Nobuhiro Kodama
    • Journal Title

      Optical Materials

      Volume: 36 Pages: 1776-1780

    • Related Report
      2014 Research-status Report
  • [Presentation] Morphology of surface nanostructures in oxide crystals and glasses gabricated by femtosecond laser ablation or focused ion beam etching2016

    • Author(s)
      Nobuhiro Kodama
    • Organizer
      Intl. Conf.on High Temperature Ceramic Matrix Composites and Gloval Forum on Advanced Materials and Technologiesfor Sustainable Development
    • Place of Presentation
      Tronto, Canada
    • Year and Date
      2016-06-26
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Morphology of surface nanostructures in oxide crystals and glasses fabricated by femtosecond laser ablation or focused ion beam etching2016

    • Author(s)
      Nobuhiro Kodama
    • Organizer
      9th Intl. Conf. on High Temperature Ceramic Matrix Composites and Global Forum on Advanced Materials and Technologies for Sustainable Development
    • Place of Presentation
      Tronto, Canada
    • Year and Date
      2016-06-26
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] フェムト秒レーザーアブレーションで形成されたホウ酸塩及びアルミノケイ酸塩表面のナノホールのモルフォロジー変化2016

    • Author(s)
      小玉 展宏
    • Organizer
      日本セラミックス協会 年会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2016-03-14
    • Related Report
      2015 Research-status Report
  • [Presentation] フェムト秒レーザーアブレーション及び集束イオンビームエッチングによるホウ酸塩ガラスおよび結晶表面へのナノホールの形成とモルフォロジー2015

    • Author(s)
      工藤 瑞己
    • Organizer
      日本セラミックス協会 秋季シンポジウム
    • Place of Presentation
      富山大学
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] 2成分系希土類ホウ酸塩の真空紫外励起での自己束縛励起子発光の温度及び材料依存:2重励起子生成の可能性2015

    • Author(s)
      小玉 展宏
    • Organizer
      日本セラミックス協会 秋季シンポジウム
    • Place of Presentation
      富山大学
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
  • [Presentation] 真空紫外励起による2成分系希土類スカンジウムホウ酸塩の固有発光と自己束縛励起子からのエネルギー移動2014

    • Author(s)
      阿部 明莉
    • Organizer
      日本セラミックス協会 秋季シンポジウム
    • Place of Presentation
      鹿児島大学
    • Year and Date
      2014-09-09 – 2014-09-11
    • Related Report
      2014 Research-status Report
  • [Presentation] フェムト秒レーザーアブレーションにより形成したホウ酸塩及びガラスにおけるナノホールのモルフォロジー2014

    • Author(s)
      坂下 智美
    • Organizer
      日本セラミックス協会 秋季シンポジウム
    • Place of Presentation
      鹿児島大学
    • Year and Date
      2014-09-09 – 2014-09-11
    • Related Report
      2014 Research-status Report
  • [Presentation] Morphology of nanoholes in borate crystals and glasses fabricated by femtosecond laser ablation2014

    • Author(s)
      Nobuhiro Kodama
    • Organizer
      6th EPS-QEOD Europhoton Conference on Solid-State,Fabre, and Waveguide Coherent Light Sources
    • Place of Presentation
      Neuchatel, Switzerland
    • Year and Date
      2014-08-24 – 2014-08-29
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2018-03-22  

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