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Optical injection of spin-polarized carriers in indirect gap semiconductors

Research Project

Project/Area Number 26400317
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics I
Research InstitutionKyoto University

Principal Investigator

Naka Nobuko  京都大学, 理学研究科, 准教授 (10292830)

Co-Investigator(Kenkyū-buntansha) 秋元 郁子  和歌山大学, システム工学部, 准教授 (00314055)
Research Collaborator STOLZ Heinrich  ロストク大学, 物理学科, 教授
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords光キャリア / 間接遷移型半導体 / スピン緩和
Outline of Final Research Achievements

Indirect bandgap semiconductors including silicon are currently a major focus of research for solar cell and spin device applications. However, there had been no report on the spin relaxation time of optically injected delocalized carriers in diamond. In this study, we demonstrated optical injection of spin-polarized carriers in indirect bandgap semiconductors, which paves a way to the versatile applications of spin and momentum degrees of freedom.

Report

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

    (55 results)

All 2017 2016 2015 2014 Other

All Int'l Joint Research (1 results) Journal Article (10 results) (of which Peer Reviewed: 9 results,  Acknowledgement Compliant: 8 results) Presentation (43 results) (of which Int'l Joint Research: 9 results,  Invited: 6 results) Remarks (1 results)

  • [Int'l Joint Research] Uppsala University(Sweden)

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Two optical routes of cold carrier injection in silicon revealed by time-resolved excitation spectroscopy2017

    • Author(s)
      Ikuko Akimoto and Nobuko Naka
    • Journal Title

      Applied Physics Express

      Volume: 印刷中

    • NAID

      210000135868

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] 高純度ダイヤモンドにおける励起子拡散のメカニズム2017

    • Author(s)
      中暢子、森本光、挾間優治、田中耕一郎
    • Journal Title

      光アライアンス

      Volume: 28 Pages: 35-38

    • NAID

      40021111612

    • Related Report
      2016 Annual Research Report
    • Acknowledgement Compliant
  • [Journal Article] Excitons and fundamental transport properties of diamond under photo-injection (Feature Article)2016

    • Author(s)
      N. Naka, H. Morimoto, and I. Akimoto
    • Journal Title

      Physica Status Solidi (a)

      Volume: 213 Issue: 10 Pages: 2551-2563

    • DOI

      10.1002/pssa.201600237

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Exciton lifetime and diffusion length in high-purity chemical-vapor-deposition diamond2016

    • Author(s)
      Hikaru Morimoto, Yuji Hazama, Koichiro Tanaka, and Nobuko Naka
    • Journal Title

      Diamond and Related Materials

      Volume: 63 Pages: 47-50

    • DOI

      10.1016/j.diamond.2015.11.010

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Ultrahigh exciton diffusion in intrinsic diamond2015

    • Author(s)
      Hikaru Morimoto, Yuji Hazama, Koichiro Tanaka, and Nobuko Naka
    • Journal Title

      Physical Review B

      Volume: 92 Issue: 20 Pages: 201202-201202

    • DOI

      10.1103/physrevb.92.201202

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Time-resolved cyclotron resonance on dislocation-free HPHT diamond2015

    • Author(s)
      I. Akimoto, N. Naka, N. Tokuda
    • Journal Title

      Diamond & Related Materials

      Volume: 63 Pages: 38-42

    • DOI

      10.1016/j.diamond.2015.08.013

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Mass-anisotropy splitting of indirect excitons in diamond2014

    • Author(s)
      Yuji Hazama, Nobuko Naka, and Heinrich Stolz
    • Journal Title

      Physical Review B

      Volume: 90 Issue: 4

    • DOI

      10.1103/physrevb.90.045209

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] High carrier mobility in ultrapure diamond measured by time-resolved cyclotron resonance2014

    • Author(s)
      Ikuko Akimoto, Katsuyuki Fukai, Yushi Handa, and Nobuko Naka
    • Journal Title

      Applied Physics Letters

      Volume: 105 Issue: 3

    • DOI

      10.1063/1.4891039

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Nanosecond cyclotron resonance in ultrapure diamond2014

    • Author(s)
      Nobuko Naka, Katsuyuki Fukai, Yushi Handa, and Ikuko Akimoto
    • Journal Title

      Journal of Luminescence

      Volume: 152 Pages: 93-97

    • DOI

      10.1016/j.jlumin.2013.12.055

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Relaxation of localized excitons by phonon emission at oxygen vacancies in Cu2O2014

    • Author(s)
      Sandhaya Koirala, Mitsuyoshi Takahata, Yuji Hazama, Nobuko Naka, and Koichiro Tanaka
    • Journal Title

      Journal of Luminescence

      Volume: 155 Pages: 65-69

    • DOI

      10.1016/j.jlumin.2014.06.027

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Presentation] Enhanced electron mobility in intrinsic diamond at cryogenic temperatures2017

    • Author(s)
      N. Naka, I. Akimoto, T. Shimomura, Ian Friel, and J. Isberg
    • Organizer
      Hasselt Diamond Workshop SBDD XXII
    • Place of Presentation
      Hasselt, Belgium
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Quantitative discussion on the relevance of substitutional impurities to exciton and charge-carrier lifetimes2017

    • Author(s)
      T. Shimomura, N. Naka, N. Tokuda, and I. Akimoto
    • Organizer
      Hasselt Diamond Workshop SBDD XXII
    • Place of Presentation
      Hasselt, Belgium
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高純度シリコン結晶におけるバレー選択的光キャリア生成2017

    • Author(s)
      秋元郁子、中暢子
    • Organizer
      日本物理学会第72回年次大会(2017年)
    • Place of Presentation
      大阪大学(豊中キャンパス)
    • Related Report
      2016 Annual Research Report
  • [Presentation] ダイヤモンドにおける光励起キャリアのテラヘルツ時間領域分光2017

    • Author(s)
      市井智章、中暢子、挾間優治、田中耕一郎
    • Organizer
      日本物理学会第72回年次大会(2017年)
    • Place of Presentation
      大阪大学(豊中キャンパス)
    • Related Report
      2016 Annual Research Report
  • [Presentation] ダイヤモンド中の光励起キャリアに対する不純物散乱の定量評価2017

    • Author(s)
      下村尊明、中暢子、徳田規夫、秋元郁子
    • Organizer
      日本物理学会第72回年次大会(2017年)
    • Place of Presentation
      大阪大学(豊中キャンパス)
    • Related Report
      2016 Annual Research Report
  • [Presentation] 非弾性二体衝突によるCu2Oリュードベリ励起子の生成と消滅2017

    • Author(s)
      高畑光善、北村達矢、中暢子
    • Organizer
      日本物理学会第72回年次大会(2017年)
    • Place of Presentation
      大阪大学(豊中キャンパス)
    • Related Report
      2016 Annual Research Report
  • [Presentation] ダイヤモンド超格子における励起子及び電正孔液滴発光2017

    • Author(s)
      矢田部 翼、嵐田 雄介、南 不二雄、中 暢子、渡邊 幸志、片山 郁文、武田 淳
    • Organizer
      応用物理学会
    • Place of Presentation
      パシフィコ横浜
    • Related Report
      2016 Annual Research Report
  • [Presentation] 高純度CVD及びHPHTダイヤモンド基板における格子欠陥の赤外分光2016

    • Author(s)
      下村尊明、中暢子、徳田規夫、秋元郁子
    • Organizer
      日本物理学会 第71回年次大会
    • Place of Presentation
      関西大学千里山キャンパス
    • Year and Date
      2016-03-21
    • Related Report
      2015 Research-status Report
  • [Presentation] ダイヤモンドにおける非平衡電子正孔系の熱緩和と輸送2016

    • Author(s)
      森本光、挾間優治、田中耕一郎、中暢子
    • Organizer
      日本物理学会 第71回年次大会
    • Place of Presentation
      関西大学千里山キャンパス
    • Year and Date
      2016-03-20
    • Related Report
      2015 Research-status Report
  • [Presentation] 高純度シリコン結晶における光生成キャリアのダイナミクス2016

    • Author(s)
      秋元郁子、大畠慶三、中暢子
    • Organizer
      日本物理学会 第71回年次大会
    • Place of Presentation
      関西大学千里山キャンパス
    • Year and Date
      2016-03-20
    • Related Report
      2015 Research-status Report
  • [Presentation] Cu2Oナノ薄膜における励起子の非局所光応答の観測2016

    • Author(s)
      高畑光善、中暢子、田中耕一郎
    • Organizer
      日本物理学会 第71回年次大会
    • Place of Presentation
      関西大学千里山キャンパス
    • Year and Date
      2016-03-20
    • Related Report
      2015 Research-status Report
  • [Presentation] Excitons and fundamental properties of diamond2016

    • Author(s)
      N. Naka, H. Morimoto, and I. Akimoto
    • Organizer
      Hasselt diamond workshop SBDD XXI
    • Place of Presentation
      Hasselt, Belgium
    • Year and Date
      2016-03-09
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Exciton interband relaxation observed by time-resolved cyclotron resonance in diamond2016

    • Author(s)
      Ikuko Akimoto and Nobuko Naka
    • Organizer
      19th International Conference on Dynamical Processes in Excited States of Solids
    • Place of Presentation
      Paris, France
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Excitation-energy dependent carrier dynamics in silicon2016

    • Author(s)
      Nobuko Naka and Ikuko Akimoto
    • Organizer
      19th International Conference on Dynamical Processes in Excited States of Solids
    • Place of Presentation
      Dortmund, Germany
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nonlocal coupling of light and weakly confined excitons in Cu2O thin films2016

    • Author(s)
      M. Takahata, N. Naka, and K. Tanaka
    • Organizer
      13th International Workshop on Nonlinear Optics and Excitation Kinetics in Semiconductors
    • Place of Presentation
      Dortmund, Germany
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 結晶成長法の異なる高純度シリコンにおける光キャリアサイクロトロン共鳴2016

    • Author(s)
      秋元 郁子、高山 敏暢、大畠 慶三、中 暢子
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学(角間キャンパス)
    • Related Report
      2016 Annual Research Report
  • [Presentation] Cu2O励起子の非局所応答による輻射緩和増強の温度依存性2016

    • Author(s)
      高畑光善、中暢子、田中耕一郎
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学(角間キャンパス)
    • Related Report
      2016 Annual Research Report
  • [Presentation] 電子スピン共鳴法を用いた高純度ダイヤモンドにおける窒素不純物の定量2016

    • Author(s)
      下村尊明、中暢子、徳田規夫、秋元郁子
    • Organizer
      第55回電子スピンサイエンス学会
    • Place of Presentation
      大阪市立大学(杉本キャンパス)
    • Related Report
      2016 Annual Research Report
  • [Presentation] 高純度ダイヤモンドにおける不純物の定量評価と不純物散乱レートの考察2016

    • Author(s)
      下村尊明、中暢子、徳田規夫、秋元郁子
    • Organizer
      第27回光物性研究会
    • Place of Presentation
      神戸大学百年記念館
    • Related Report
      2016 Annual Research Report
  • [Presentation] 高純度ダイヤモンド単結晶における励起子拡散のメカニズム2015

    • Author(s)
      森本光、挾間優治、田中耕一郎、中暢子
    • Organizer
      第26回光物性研究会
    • Place of Presentation
      神戸大学百年記念館
    • Year and Date
      2015-12-12
    • Related Report
      2015 Research-status Report
  • [Presentation] 高抵抗シリコンにおける定常・パルス光生成キャリアによるサイクロトロン共鳴の比較2015

    • Author(s)
      大畠慶三、合羽一貴、半田裕之、秋元郁子、中暢子
    • Organizer
      日本物理学会2015年秋季大会
    • Place of Presentation
      関西大学千里山キャンパス
    • Year and Date
      2015-09-18
    • Related Report
      2015 Research-status Report
  • [Presentation] 高純度ダイヤモンドにおける励起子拡散の起源2015

    • Author(s)
      森本光、挾間優治、中暢子、田中耕一郎
    • Organizer
      日本物理学会2015年秋季大会
    • Place of Presentation
      関西大学千里山キャンパス
    • Year and Date
      2015-09-17
    • Related Report
      2015 Research-status Report
  • [Presentation] 高抵抗シリコンにおける光キャリア生成過程の励起波長依存性2015

    • Author(s)
      秋元郁子、大畠慶三、半田裕之、中暢子
    • Organizer
      日本物理学会2015年秋季大会
    • Place of Presentation
      関西大学千里山キャンパス
    • Year and Date
      2015-09-17
    • Related Report
      2015 Research-status Report
  • [Presentation] Mid-infrared response of Fermi-degenerate electron-hole droplets in diamond2015

    • Author(s)
      Junko Omachi, Nobuko Naka, Kosuke Yoshioka, and Makoto Kuwata-Gonokami
    • Organizer
      Fundamental optical processes in semiconductors (FOPS) 2015
    • Place of Presentation
      Breckenridge, CO, USA
    • Year and Date
      2015-08-02
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Exciton diffusion coefficient measured by photoluminescence imaging in ultrapure diamond2015

    • Author(s)
      H. Morimoto, Y. Hazama, K. Tanaka, and N. Naka
    • Organizer
      The 9th international conference on new diamond and nano carbons 2015
    • Place of Presentation
      Shizuoka, Japan
    • Year and Date
      2015-05-27
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Time-resolved cyclotron resonance on dislocation-free HPHT diamond2015

    • Author(s)
      I. Akimoto, N. Naka, and N. Tokuda
    • Organizer
      The 9th international conference on new diamond and nano carbons 2015
    • Place of Presentation
      Shizuoka, Japan
    • Year and Date
      2015-05-26
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] ダイヤモンド-究極の半導体光学材料2015

    • Author(s)
      中暢子
    • Organizer
      日本学術会議主催公開シンポジウム
    • Place of Presentation
      東京大学本郷キャンパス
    • Year and Date
      2015-04-21
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] 時間分解サイクロトロン共鳴による励起子と正孔緩和の観測2015

    • Author(s)
      秋元郁子,中暢子
    • Organizer
      日本物理学会第70回年次大会
    • Place of Presentation
      早稲田大学早稲田キャンパス
    • Year and Date
      2015-03-23
    • Related Report
      2014 Research-status Report
  • [Presentation] 時間分解サイクロトロン共鳴による励起子二体衝突レートの測定2015

    • Author(s)
      中暢子,秋元郁子
    • Organizer
      日本物理学会第70回年次大会
    • Place of Presentation
      早稲田大学早稲田キャンパス
    • Year and Date
      2015-03-21
    • Related Report
      2014 Research-status Report
  • [Presentation] Diamond-an extreme material for semiconductor optics2015

    • Author(s)
      中暢子
    • Organizer
      9th Japanese-French Frontiers of Science Symposium
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      2015-01-23
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Momentum and spin relaxation times for optically excited delocalized carriers in group-IV semiconductors2014

    • Author(s)
      N. Naka and I. Akimoto
    • Organizer
      12th International Conference on Nonlinear Optics and Excitation Kinetics in Semiconductors
    • Place of Presentation
      Bremen, Germany
    • Year and Date
      2014-09-23
    • Related Report
      2014 Research-status Report
  • [Presentation] Observation of nonequilibrium gas-liquid phase transition of the electron-hole system in diamond2014

    • Author(s)
      Y. Hazama, N. Naka, M. Kuwata-Gonokami, and K. Tanaka
    • Organizer
      12th International Conference on Nonlinear Optics and Excitation Kinetics in Semiconductors
    • Place of Presentation
      Bremen, Germany
    • Year and Date
      2014-09-23
    • Related Report
      2014 Research-status Report
  • [Presentation] Excitons and carrier effective masses in intrinsic diamond2014

    • Author(s)
      Nobuko Naka, Yuji Hazama, and Ikuko Akimoto
    • Organizer
      International Conference on Diamond and Carbon Materials
    • Place of Presentation
      Madrid, Spain
    • Year and Date
      2014-09-10
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] 高純度ダイヤモンド単結晶における励起子移動度の測定2014

    • Author(s)
      森本光,挾間優治,中暢子,田中耕一郎
    • Organizer
      日本物理学会2014年秋季大会
    • Place of Presentation
      中部大学春日井キャンパス
    • Year and Date
      2014-09-10
    • Related Report
      2014 Research-status Report
  • [Presentation] 高純度シリコン結晶における光キャリアの時間分解サイクロトロン共鳴2014

    • Author(s)
      秋元郁子,深井克行,中暢子
    • Organizer
      日本物理学会2014年秋季大会
    • Place of Presentation
      中部大学春日井キャンパス
    • Year and Date
      2014-09-10
    • Related Report
      2014 Research-status Report
  • [Presentation] ダイヤモンドの励起子における異方的交換相互作用2014

    • Author(s)
      挾間優治,S. A. McGill,J. G. Cherian,J. S. Brooks,中暢子
    • Organizer
      日本物理学会2014年秋季大会
    • Place of Presentation
      中部大学春日井キャンパス
    • Year and Date
      2014-09-08
    • Related Report
      2014 Research-status Report
  • [Presentation] High carrier mobility of diamond measured by cyclotron resonance2014

    • Author(s)
      I. Akimoto, Y. Handa, K. Fukai, and N. Naka
    • Organizer
      The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014)
    • Place of Presentation
      Fukuoka, Japan
    • Year and Date
      2014-08-26
    • Related Report
      2014 Research-status Report
  • [Presentation] High-efficiency detection of free carriers via Auger ionization in wide-gap semiconductors2014

    • Author(s)
      Nobuko Naka and Ikuko Akimoto
    • Organizer
      32nd international conference on the physics of semiconductors
    • Place of Presentation
      Austin, Texas, USA
    • Year and Date
      2014-08-14
    • Related Report
      2014 Research-status Report
  • [Presentation] Momentum relaxation times for optically excited delocalized electrons and holes in pristine diamond2014

    • Author(s)
      I. Akimoto and N. Naka
    • Organizer
      Awaji International Workshop on “Electron Spin Science & Technology: Biological and Materials Science Oriented Application
    • Place of Presentation
      Awaji, Japan
    • Year and Date
      2014-06-17
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Polyexcitons and electron-hole droplet condensation in diamond2014

    • Author(s)
      Nobuko Naka
    • Organizer
      The 7th international conference on spontaneous coherence in excitonic systems
    • Place of Presentation
      Hakone, Japan
    • Year and Date
      2014-04-22
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Free-carrier generation by excitonic two-body collisions in semiconductors2014

    • Author(s)
      I. Akimoto and N. Naka
    • Organizer
      The 7th international conference on spontaneous coherence in excitonic systems
    • Place of Presentation
      Hakone, Japan
    • Year and Date
      2014-04-22
    • Related Report
      2014 Research-status Report
  • [Presentation] Polyexcitons in the phase diagram of the electron-hole system in diamond2014

    • Author(s)
      Yuji Hazama, Nobuko Naka, Makoto Kuwata-Gonokami, and Koichiro Tanaka
    • Organizer
      The 7th international conference on spontaneous coherence in excitonic systems
    • Place of Presentation
      Hakone, Japan
    • Year and Date
      2014-04-22
    • Related Report
      2014 Research-status Report
  • [Presentation] Trapping mechanism and energy relaxation of paraexcitons localized at oxygen vacancies in cuprous oxide2014

    • Author(s)
      Sandhaya Koirala, Mitsuyoshi Takahata, Yuji Hazama, Nobuko Naka, and Koichiro Tanaka
    • Organizer
      The 7th international conference on spontaneous coherence in excitonic systems
    • Place of Presentation
      Hakone, Japan
    • Year and Date
      2014-04-22
    • Related Report
      2014 Research-status Report
  • [Remarks] Nobuko Naka

    • URL

      http://www.hikari.scphys.kyoto-u.ac.jp/jp/index.php?Nobuko%20Naka

    • Related Report
      2016 Annual Research Report 2015 Research-status Report 2014 Research-status Report

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Published: 2014-04-04   Modified: 2020-05-15  

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