Journal Papers

  1. Daisuke Yokota, Haruka Abe, Shingo Saito, Kento Yanagihashi, Takayuki Chiba, and Takao Oto
    "Highly stable and bright CsPbI3 nanocrystal red emitters based on color-conversion from InGaN-based blue light-emitting diodes"
    Appl. Phys. Lett. 125, 133502 (2024). (AIP Publishing Showcase)

  2. Shin-ichiro Sato and Takao Oto
    "Room temperature optical coupling of neodymium ions to photonic crystal L3 cavity in gallium nitride semiconductor"
    Appl. Phys. Express 17, 072001 (2024).

  3. Takao Oto, Aoto Aihara, Kai Motoyama, Shunsuke Ishizawa, Koichi Okamoto, Rie Togashi, and Katsumi Kishino
    "Plasmonic red-light-emission enhancement by honeycomb-latticed InGaN/GaN ordered fine nanocolumn arrays"
    Appl. Phys. Express 16, 115001 (2023).

  4. Hinako Ebe, Rikuo Suzuki, Shusuke Sumikoshi, Mizuho Uwano, Reine Moriyama, Daisuke Yokota, Mahiro Otaki, Kazushi Enomoto, Takao Oto, Takayuki Chiba, and Junji Kido
    "Guanidium Iodide Treatment of Size-controlled CsPbI3 Quantum Dots for Stable Crystal Phase and Highly Efficient Red LEDs"
    Chem. Eng. J. 471, 144578 (2023).

  5. Kiran Saba, Anna Kafar, Jacek Kacperski, Krzysztof Gibasiewicz, Dario Schiavon, Takao Oto, Szymon Grzanka, Piotr Perlin
    "Monolithic 45 degree deflecting mirror as a key element for realization of 2D arrays of laser diodes based on AlInGaN semiconductors"
    Micromachines 14, 352 (2023).

  6. Naoki Shimosako, Kazuya Kinjo, Yuta Inose, Toshihiro Nakaoka, Takao Oto, Katsumi Kishino, and Kazuhiro Ema
    "Energy diagram and parameters regarding localized states in InGaN/GaN nanocolumns"
    J. Appl. Phys. 130, 143106 (2021).

  7. Takao Oto, Masato Namazuta, Shotaro Hayakawa, Koichi Okamoto, Rie Togashi, and Katsumi Kishino
    "Comparison of surface plasmon polariton characteristics of Ag- and Au-based InGaN/GaN nanocolumn plasmonic crystals"
    Appl. Phys. Express 14, 105002 (2021).

  8. Takao Oto, Masato Okamura, Yuzo Matsui, Kai Motoyama, Shunsuke Ishizawa, Rie Togashi, and Katsumi Kishino
    "Photonic band characterization in InGaN/GaN nanocolumn arrays with triangular and honeycomb lattices by angle-resolved micro-photoluminescence measurements"
    Jpn. J. Appl. Phys. Rapid Communication, 60, 060904 (2021).

  9. Naoki Shimosako, Yuta Inose, Kazuya Kinjo, Toshihiro Nakaoka, Takao Oto, Katsumi Kishino, and Kazuhiro Ema
    “Carrier density dependence of localized carrier recombination dynamics in orange-emitting InGaN/GaN nanocolumns”
    J. Appl. Phys. 128, 133102 (2020).

  10. Katsumi Kishino, Naoki Sakakibara, Kazuki Narita, and Takao Oto
    “Two-dimensional multicolor (RGBY) integrated nanocolumn micro-LEDs as a fundamental technology of micro-LED display”
    Appl. Phys. Express 13, 013003 (2020). (Spotlights)

  11. Takao Oto, Yutaro Mizuno, Koji Yamano, Jun Yoshida, and Katsumi Kishino
    “Column diameter dependence of strain relaxation effect in GaN/AlGaN quantum wells on GaN nanocolumn arrays”
    Appl. Phys. Express 12, 125001 (2019).

  12. Takao Oto, Yutaro Mizuno, Jun Yoshida, Ai Yanagihara, Rin Miyagawa, Kazuhiro Ema, and Katsumi Kishino
    “Effects of introduction of InGaN quantum structures on structural and optical properties of InGaN nanocolumns”
    Phys. Status Solidi B 255, 1700481 (2018).

  13. Takao Oto, Kazuma Kikuchi, Koichi Okamoto, and Katsumi Kishino
    “Enhancement of light emission and internal quantum efficiency in orange and red regions for regularly arrayed InGaN/GaN nanocolumns due to surface plasmon coupling”
    Appl. Phys. Lett. 111, 133110 (2017).

  14. Takao Oto, Yutaro Mizuno, Ai Yanagihara, Kazuhiro Ema, and Katsumi Kishino
    “Effect of structural properties on optical characteristics of InGaN/GaN nanocolumns fabricated by selective area growth”
    Appl. Phys. Express 10, 045001 (2017). (Spotlights)

  15. Takao Oto, Yutaro Mizuno, Ai Yanagihara, Rin Miyagawa, Tatsuya Kano, Jun Yoshida, Naoki Sakakibara, and Katsumi Kishino
    “Influence of GaN column diameter on structural properties for InGaN nanocolumns grown on top of GaN nanocolumns”
    AIP Adv. 6, 115214 (2016).

  16. Takao Oto, Yutaro Mizuno, Rin Miyagawa, Tatsuya Kano, Jun Yoshida, Kazuhiro Ema, and Katsumi Kishino
    “Spatial emission distribution and carrier recombination dynamics in regularly arrayed InGaN/GaN quantum structure nanocolumns”
    Jpn. J. Appl. Phys. 55, 105001 (2016).

  17. Tatsuya Kano, Jun Yoshida, Rin Miyagawa, Yutaro Mizuno, Takao Oto, and Katsumi Kishino
    “GaN nanocolumn arrays with diameter < 30 nm prepared by two-step selective area growth”
    Electon. Lett. 51, 2125-2126 (2015).

  18. Naoki Shimosako, Yuta Inose, Hikaru Satoh, Kazuya Kinjo, Toshihiro Nakaoka, Takao Oto, Katsumi Kishino, and Kazuhiro Ema
    “Carrier-density dependence of photoluminescence from localized states in InGaN/GaN quantum wells in　nanocolumns and a thin film”
    J. Appl. Phys. 118, 175702 (2015).

  19. Anna Kafar, Szymon Starnczyk, Prezemek Wisniewski, Takao Oto, Irina Makarowa, Grzegorz Targowski, Tadeusz Suski, and Piotr Perlin
    “Design and optimization of InGaN superluminescenct diodes”
    Phys. Status Solidi A 212, 997-1004 (2015).

  20. Yoshiya Iwata, Takao Oto, David Gachet, Ryan G. Banal, Mitsuru Funato, and Yoichi Kawakami
    “Co-existence of a few and sub micron inhomogeneities in Al-rich AlGaN/AlN quantum wells”
    J. Appl. Phys. 117, 115702 (2015).

  21. Koji Yamano, Katsumi Kishino, Hiroto Sekiguchi, Takao Oto, Akihiro Wakahara, and Yoichi Kawakami
    “Novel selective area growth (SAG) method for regularly arranged AlGaN nanocolumns using nanotemplates”
    J. Cryst. Growth 425, 316-321 (2015).

  22. Takao Oto, Ryan G. Banal, Mitsuru Funato, and Yoichi Kawakami
    “Optical gain characteristics in Al-rich AlGaN/AlN quantum wells”
    Appl. Phys. Lett. 104, 181102 (2014).

  23. Anna Kafar, Szymon Starnczyk, Grzegorz Targowski, Takao Oto, Irina Makarowa, Prezemek Wisniewski, Tadeusz Suski, and Piotr Perlin
    “High-optical-power InGaN Superluminescenct Diodes with “j-shape” Waveguide”
    Appl. Phys. Express 6, 092102 (2013).

  24. Takao Oto, Ryan G. Banal, Ken Kataoka, Mitsuru Funato, and Yoichi Kawakami
    “100 mW deep-ultraviolet emission from aluminum-nitride-based quantum wells pumped by an electron beam”
    Nat. Photon. 4, 767-771 (2010).

International Conference Proceedings

  1. Katsumi Kishino, Kazuki Narita, Ai Yanagihara, Takao Oto, and Rie Togashi
    “Nanocolumn LEDs for Monolithic Micro-LED Display”
    Proc. IDW 2018, 566-568 (2018).

  2. Kazuki Narita, Naoki Sakakibara, Takao Oto, and Katsumi Kishino
    "Emission color control for densely packed InGaN-based nanocolumns and demonstration of independent drive of multicolor (RGBY) micro-LED array"
    Proc. SPIE 10532, Gallium Nitride Materials and Devices XIII, 105321F (2018).

  3. Naoki Sakakibara, Kazuki Narita, Takao Oto, and Katsumi Kishino
    "Independent drive of integrated multicolor (RGBY) micro-LED array using regularly arrayed InGaN based nanocolumns"
    Proc. 22nd Microoptics Conference (MOC) 2017, 108-109 (2017).

  4. Takao Oto, Yutaro Mizuno, Ai Yanagihara, Rin Miyagawa, Tatsuya Kano, Jun Yoshida, Naoki Sakakibara, and Katsumi Kishino
    “Systematic investigation of critical column diameter for InGaN on GaN nanocolumns by selective area growth”
    Proc. 24th Int. Symp. "Nanostructures: Physics and Technology", 35-36 (2016).

  5. Yoshiya Iwata, Takao Oto, Akio Kaneta, Ryan G. Banal, Mitsuru Funato, and Yoichi Kawakami
    “Time-resolved photoluminescence of Al-rich AlGaN/AlN quantum well under selective excitation”
    Phys. Status Solidi C 8, 2191-2193 (2011).

  6. Takao Oto, Ryan G. Banal, Mitsuru Funato, and Yoichi Kawakami
    “Deep ultraviolet emission mechanisms in highly excited Al0.79Ga0.21N/AlN quantum wells”
    Phys. Status Solidi C 7, 1909-1912 (2010).

書籍 (Japanese)

  1. 大音隆男，岸野克巳
    「ナノコラム構造と表面プラズモン結合による赤色発光増強技術」
    マイクロLEDディスプレイ―市場と要素技術の開発動向―，第2章第2節 (サイエンス＆テクノロジー，2021).

学会誌 (Japanese)

  1. 岸野克巳，富樫理恵，大音隆男
    「マイクロLED（μLED）ディスプレイに向けたInGaN/GaNナノコラムの進展」
    日本結晶成長学会誌 51, 51-2-02 (2024).

Invited Talks

  1. Takao Oto，Takayuki Chiba, Koichi Okamoto，Rie Togashi，and Katsumi Kishino
    "Red-emission enhancement from InGaN-based emitters using hybrid nanostructures"
    IHPP PAS Seminar on Nitride Semiconductors，3/5 (2024).

  2. 大音隆男，早川将太朗，岡本晃一，富樫理恵，岸野克巳
    「InGaN ナノコラムアレイのフォトニック/プラズモニックバンド強結合と発光増強特性」
    SORW　第4回半導体ナノフォトニクス研究会，11/22 (2023).

  3. 大音隆男，岡本晃一，山田純平，富樫理恵，岸野克巳
    「ナノ周期構造を用いた窒化物半導体の発光増強技術 」
    第14回ナノ構造エピタキシャル成長講演会，11/25 (2022).

  4. 大音隆男，岡本晃一，山田純平，富樫理恵，岸野克巳
    「赤色InGaN発光増強のためのプラズモニックナノ構造の最適化」
    SORW　第3回半導体ナノフォトニクス研究会，11/23 (2022).

  5. 大音隆男，岸野克巳
    「InGaN赤色ナノコラムLEDの高効率化に向けたナノ結晶・プラズモニック効果の探索」
    応用物理学会第157回結晶工学分科会研究会，オンライン，6/1 (2022).

  6. Takao Oto，Koichi Okamoto，Rie Togashi，and Katsumi Kishino
    "Nanocrystalline effects in InGaN nanocolumns and red emission enhancement by plasmonic crystals"
    IHPP PAS Seminar on Nitride Semiconductors，Online，12/22 (2021).

  7. 大音隆男，岡本晃一，富樫理恵，岸野克巳
    「InGaNナノコラムにおけるナノ結晶効果と表面プラズモン結合を用いた赤色発光増強技術」
    ワイドギャップ半導体学会第4回研究会「新領域レーザ、発光素子の進展、極限の追求と応用展開」，オンライン，12/09 (2021).

  8. 大音隆男，岡本晃一，富樫理恵，岸野克巳
    「InGaNナノコラムプラズモニック結晶の構造設計と赤色発光の高効率化」
    SORW　第2回半導体ナノフォトニクス研究会，オンライン，11/16 (2021).

  9. 大音隆男，岡本晃一，富樫理恵，岸野克巳
    「ナノコラムプラズモニック結晶を用いた赤色発光増強技術」
    SORW　第1回半導体ナノフォトニクス研究会，オンライン，11/17 (2020).

  10. Takao Oto, Yutaro Mizuno, Ai Yanagihara, Kazuhiro Ema, and Katsumi Kishino
    “Structural and optical properties in InGaN/GaN nanocolumns fabricated by selective-area growth”
    Energy Materials Nanotechnology (EMN) Meeting on Epitaxy 2017, A07, Barcelona, Spain, Sep. 11-15 (2017).

  11. 大音隆男，水野祐太郎，柳原藍，江馬一弘，岸野克巳
    「選択成長GaNナノコラム上InGaNの構造・光学特性」
    第9回ナノ構造・エピタキシャル成長講演会，I-Fr-5，北海道大学，7/12-7/15 (2017).

  12. 大音隆男，ライアンバナル，片岡研，船戸充，川上養一
    「電子線励起法によるAlGaN/AlN量子井戸からの高出力・高効深紫外発光」
    2011年春季第58回応用物理学関係連合講演会，26p-BY-1，神奈川工科大学，3/24-3/27 (2011)．

その他の講演・学会発表等はこちら

Patents

  1. Yoichi Kawakami, Mitsuru Funato, Takao Oto, Ryan G. Banal, Masanori Yamaguchi, Ken Kataoka, and Hiroshige Hata
    European Patent Application Publication, “Ultraviolet Irradiation Apparatus”
    Pub. No.: 2579295, Pub. Date: Oct. 09, 2014.

  2. Yoichi Kawakami, Mitsuru Funato, Takao Oto, Ryan G. Banal, Masanori Yamaguchi, Ken Kataoka, and Hiroshige Hata
    Taiwan Patent Application Publication, “Ultraviolet Irradiation Apparatus”
    Pub. No.: I 407593, Pub. Date: Sep. 1, 2013.

  3. Yoichi Kawakami, Mitsuru Funato, Takao Oto, Ryan G. Banal, Masanori Yamaguchi, Ken Kataoka, and Hiroshige Hata
    United States Patent Application Publication, “Ultraviolet Irradiation Apparatus”
    Pub. No.: US 2013/0075697 A1, Pub. Date: Mar. 28, 2013.

  4. 川上養一，船戸充，大音隆男，バナルライアンガニパン，山口真典，片岡研，羽田博成
    特許第5192097 号，「紫外線照射装置」，2013/5/8 特許公開．