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Optically isotropic liquid crystal based on designed defect-distribution and polarization-independent electrooptic device

Research Project

Project/Area Number 21K18722
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 21:Electrical and electronic engineering and related fields
Research InstitutionOsaka University

Principal Investigator

Ozaki Masanori  大阪大学, 大学院工学研究科, 教授 (50204186)

Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2021: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywords液晶 / コレステリックブルー相 / 格子配列 / 配向制御 / 光配向 / 光デバイス / 配光欠陥 / 配向欠陥
Outline of Research at the Start

液晶光制御デバイスは液晶の誘電的、光学的異方性を利用しているが、その特性は入射光の偏光状態に依存し、応用上の制限を受ける場合が多い。一方、異方性を生み出す分子配列は、デバイスの基板界面や外部電界印加の影響により、配向場の不整合(トポロジカル欠陥)を内包する場合が多い。本研究では、従来の液晶デバイスでは有害なもの不要なものと考えられてきた欠陥の配列を空間的に制御することにより、光学的に等方な液晶を実現し、入射光の偏向に依存しない光デバイスを開発する。

Outline of Final Research Achievements

Since liquid crystal optical devices utilize the anisotropy of liquid crystals, their properties often depend on the polarization state of the incident light, limiting their application. On the other hand, molecular arrays that produce anisotropy often contain inconsistencies in the alignment field (topological defects). In this study, we aimed to realize optically isotropic liquid crystals and explore novel optical devices by controlling the spatial arrangement of defects which have been conventionally considered detrimental. Specifically, we focused on blue-phase liquid crystals that stabilize a three-dimensional helical structure by coexistence with topological defects, and achieved macroscopic control of the lattice plane and lattice axis by providing an easy-axis for orientation on the device substrate surface and applying an electric field, aiming at precise control of the lattice arrangement of the blue-phase liquid crystal.

Academic Significance and Societal Importance of the Research Achievements

光学的等方性電気光学効果を実現するための一つの候補材料が、三次元螺旋構造を有するコレステリックブルー相液晶である。ブルー相液晶は、偏光無依存な光位相変調や高速応答性などの魅力的な性質を有しているが、分子配列のみならず格子構造の配列制御が困難であった。本研究では、電界印加処理によりブルー相液晶の格子配列、すなわち、欠陥配列を大面積高品位に制御することを可能としている。このことは、液晶の自己組織性とトップダウン的配向制御を融合することにより、デバイスレベルでの広範囲での結晶方位制御を可能とし、液晶光デバイスの応用可能性を広げた点で意義がある。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (30 results)

All 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (8 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 8 results,  Open Access: 1 results) Presentation (21 results) (of which Int'l Joint Research: 8 results,  Invited: 1 results)

  • [Int'l Joint Research] Beihang University(中国)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Electro-optics of blue phase liquid crystal in field-perpendicular direction2023

    • Author(s)
      Zhang Yuxian、Yoshida Hiroyuki、Wang Qiong-Hua、Ozaki Masanori
    • Journal Title

      Applied Physics Letters

      Volume: 122 Issue: 16 Pages: 36130-36137

    • DOI

      10.1063/5.0142383

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 2D/3D perovskite heterostructure solar cell with orientation-controlled Dion-Jacobson 2D phase2023

    • Author(s)
      Uzurano Genya、Kuwahara Nao、Saito Tomoki、Abe Kentaro、Miyake Shogo、Hishida Daizo、Takeoka Yuko、Fujii Akihiko、Ozaki Masanori
    • Journal Title

      Applied Physics Express

      Volume: 16 Issue: 4 Pages: 041005-041005

    • DOI

      10.35848/1882-0786/accd44

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Frustrated lattice orientation of cholesteric blue phase II induced by micro-patterned surface alignment2022

    • Author(s)
      Nakajima Kazuma、Tsukamoto Yuji、Mitsuhashi Shogo、Ozaki Masanori
    • Journal Title

      Applied Physics Express

      Volume: 15 Issue: 7 Pages: 071007-071007

    • DOI

      10.35848/1882-0786/ac75aa

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fast-Coating Process Based on Elongated Rodlike Preaggregate for Highly Oriented Thin Film of Donor-Acceptor π-Conjugated Polymer2022

    • Author(s)
      Minowa Yu、Yabuuchi Yuta、Nagano Shusaku、Nagamatsu Shuichi、Fujii Akihiko、Ozaki Masanori
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 14 Issue: 44 Pages: 50112-50119

    • DOI

      10.1021/acsami.2c13516

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Layer-number tailoring and template-induced orientation control of 2D perovskites on 3D perovskites by adopting the Dion-Jacobson phase2022

    • Author(s)
      Uzurano Genya、Abe Kentaro、Saito Tomoki、Fujii Akihiko、Ozaki Masanori
    • Journal Title

      Applied Physics Express

      Volume: 15 Issue: 11 Pages: 111002-111002

    • DOI

      10.35848/1882-0786/ac9883

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Three-dimensional lattice deformation of blue phase liquid crystals under electrostriction2022

    • Author(s)
      Zhang Yuxian、Yoshida Hiroyuki、Chu Fan、Guo Yu-Qiang、Yang Zhou、Ozaki Masanori、Wang Qiong-Hua
    • Journal Title

      Soft Matter

      Volume: 18 Issue: 17 Pages: 3328-3334

    • DOI

      10.1039/d2sm00244b

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Generation of a focused optical vortex beam using a liquid crystal spiral zone plate2022

    • Author(s)
      Yuji Tsukamoto, Hiroyuki Yoshida, and Masanori Ozaki
    • Journal Title

      Optics Express

      Volume: Vol. 30, No. 6 Issue: 6 Pages: 8667-8675

    • DOI

      10.1364/oe.451293

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Generation of coaxial vortex beams with doubled topological charges using a stacked liquid crystal structure2021

    • Author(s)
      Yuji Tsukamoto, Hiroyuki Yoshida, and Masanori Ozaki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: Vol. 60, No. 120906 Issue: 12 Pages: 120906-120906

    • DOI

      10.35848/1347-4065/ac3182

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 液晶マイクロフレネルゾーンプレートによる集光スポット位置の精密制御2023

    • Author(s)
      塚本脩仁、尾﨑雅則
    • Organizer
      2023年第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 強誘電性ネマティック液晶の分子配向に及ぼすラビング対称性の効果2023

    • Author(s)
      上藤大和、仲嶋一真、塚本脩仁、尾﨑雅則、菊池 裕嗣
    • Organizer
      2023年第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] くさび型セルを用いたコレステリックブルー相の相転移挙動に及ぼす界面効果に関する研究2022

    • Author(s)
      三橋將吾、趙成龍、尾﨑雅則
    • Organizer
      応用物理学会関西支部2022年度第1回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Molecularly oriented organic-semiconductor thin film based on its mesogenic potential2022

    • Author(s)
      M. Ozaki, E. Nishimoto, G. Uzurano and A. Fujii
    • Organizer
      The 28th International Liquid Crystal Conference (ILCC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Generation of focused optical vortex with high efficiency using liquid crystal spiral zone plate2022

    • Author(s)
      Y. Tsukamoto, H. Yoshida and M. Ozaki
    • Organizer
      The 28th International Liquid Crystal Conference (ILCC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Proposal for initial parameters decision approach to optimize design of multi-twist retarders2022

    • Author(s)
      Y. Tsukamoto, H. Yoshida and M. Ozaki
    • Organizer
      The 28th International Liquid Crystal Conference (ILCC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Lattice orientation characteristics of cholesteric blue phase Ⅱ on micropatterned surface alignment2022

    • Author(s)
      K. Nakajima, R. Hasegawa, S. Mitsuhashi, Y. Tsukamoto and M. Ozaki
    • Organizer
      The 28th International Liquid Crystal Conference (ILCC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 垂直配向ポリイミド膜への紫外線照射による液晶プレチルト角の空間制御2022

    • Author(s)
      塚本脩仁、上野佳秋、中島克也、尾﨑雅則
    • Organizer
      2022年日本液晶学会討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] キラリティにより誘起されるコレステリックブルー相Ⅱの格子配向方位の回転2022

    • Author(s)
      仲嶋一真、三橋將吾、尾﨑雅則
    • Organizer
      2022年日本液晶学会討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] フラストレート配向パターンを有する液晶セル内におけるコレステリックブルー相Ⅱの格子配向2022

    • Author(s)
      仲嶋一真、三橋將吾、塚本脩仁、尾﨑雅則
    • Organizer
      2022年日本液晶学会討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] パターン配向したコレステリックブルー相の透過型電子顕微鏡観察2022

    • Author(s)
      三橋將吾、尾﨑雅則
    • Organizer
      2022年日本液晶学会討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Grandjean欠陥を含むコレステリック相からのブルー相の発現挙動に関する研究2022

    • Author(s)
      三橋將吾、尾﨑雅則
    • Organizer
      2022年第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 紫外線照射による液晶の極角配向パターニングと回折格子構造の作製2022

    • Author(s)
      上野佳秋、中島克也、塚本脩仁、尾﨑雅則
    • Organizer
      2022年第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 競合する配向パターンにより誘起されるコレステリックブルー相Ⅱの格子配向特性2022

    • Author(s)
      仲嶋一真、塚本脩仁、三橋將吾、尾﨑雅則
    • Organizer
      2022年第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Fabrication of liquid crystal grating structure with pretilt angle distribution induced by UV irradiation upon vertical alignment polyimide film2022

    • Author(s)
      Y. Tsukamoto, Y. Ueno and M. Ozaki
    • Organizer
      Optics of Liquid Crystal 2021 Satellite Workshop 2022 (OLC2021 SWS2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 紫外線照射による液晶プレチルト角の配向制御法2022

    • Author(s)
      上野佳秋、中島克也、塚本脩仁、尾﨑 雅則
    • Organizer
      応用物理学会関西支部75周年記念講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Lattice Orientation of Cholesteric Blue Phase on Patterned Alignment Surface2022

    • Author(s)
      Kazuma Nakajima, Ryo Hasegawa, Shogo Mitsuhashi, Yuji Tsukamoto, and Masanori Ozaki
    • Organizer
      Global Nanophotonics 2022 (GNP 2022), P-5, Osaka International Convention Center, Osaka, Japan
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Coaxial Optical Vortex Generator based on Stacked Structure with Photo-aligned Nematic and Planar Cholesteric Liquid Crystal Layers2022

    • Author(s)
      Yuji Tsukamoto, Hiroyuki Yoshida, and Masanori Ozaki
    • Organizer
      Global Nanophotonics 2022 (GNP 2022), P-6, Osaka International Convention Center, Osaka, Japan
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] くさび型セルを用いたコレステリックブルー相の相転移挙動に及ぼす界面効果に関する研究2021

    • Author(s)
      三橋將吾、長谷川遼、趙成龍、尾﨑雅則
    • Organizer
      2021年日本液晶学会討論会、PE16、オンライン
    • Related Report
      2021 Research-status Report
  • [Presentation] ネマティック液晶のツイストウォールを利用した点欠陥の生成2021

    • Author(s)
      中山雄介、吉田浩之、鍛冶静雄、横山知郎、尾﨑雅則
    • Organizer
      日本物理学会 2021年秋季大会、20aM2、オンライン
    • Related Report
      2021 Research-status Report
  • [Presentation] Generation of Focused Vortex Beam by Liquid Crystal Spiral Zone Plate with Homeotropic and Planer Patterned Alignment Layer2021

    • Author(s)
      Yuji Tsukamoto, Hiroyuki Yoshida, Masanori Ozaki
    • Organizer
      Optics of Liquid Crystal 2021 (OLC2021), P47, Online + The Busena Terrace, Okinawa, Japan
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-07-13   Modified: 2024-01-30  

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