Updated on 2024/05/23

写真a

 
Jessica Onaka
 
Organization
Institute for Promotion of Research Center for Optical Research and Education Assistant Professor
Title
Assistant Professor

Degree

  • Doctor of Engineering ( 2022.9   Doshisha University )

Education

  • Doshisha University   Faculty of Science and Engineering

    2020.9 - 2022.9

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    Country： Japan

    Notes： PhD

  • Doshisha University   Faculty of Science and Engineering

    2018.9 - 2020.9

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    Country： Japan

Research History

  • Utsunomiya University   Center for Optical Research and Education (CORE)   Assistant Professor   Assistant Professor

    2023.11 - Present

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    Country：Japan

  • Huawei Technologies Duesseldorf Gmbh   Optical & Quantum Communications Laboratory   Researcher   Optical Design Researcher

    2022.11 - 2023.10

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    Country：Germany

 

Papers

  • How to fix an ultrasonic variable-focus liquid crystal lens for substrate-mountable applications

    Yuma Kuroda,Yuki Harada,Jessica Onaka,Akira Emoto,Mami Matsukawa,Daisuke Koyama

    Japanese Journal of Applied Physics   2023.1

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    Publishing type：Research paper (scientific journal)   Publisher：{IOP} Publishing  

    <jats:title>Abstract</jats:title>
    <jats:p>This paper proposed a board-mounted ultrasonic variable-focus liquid crystal (LC) lens. The lens controls the focus using the acoustic radiation force generated by the resonant flexural vibration mode. The LC lens was fixed to an aluminum substrate with a hole whose aperture corresponded to the inner diameter of the transducer. The part of the LC lens attached to the substrates functioned as a fixed condition, and the flexural vibration mode was successfully generated. The fixed lens exhibited a gradual focal change with current, confirming that fixing the condition affected the rate of focal change.</jats:p>

    DOI： 10.35848/1347-4065/acb71c

  • Effects of the interlayer thickness on the optical characteristics of an ultrasound multilayered liquid crystal lens

    Yuma Kuroda,Takahiro Iwase,Jessica Onaka,Yuki Harada,Akira Emoto,Mami Matsukawa,Daisuke Koyama

    Applied Physics Express   15 ( 12 )   122004 - 122004   2022.12

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    Publishing type：Research paper (scientific journal)   Publisher：{IOP} Publishing  

    <jats:title>Abstract</jats:title>
    <jats:p>Ultrasound multilayered variable-focus liquid crystal (LC) lenses have better optical performance compared to conventional ultrasound LC lenses. This paper investigates the effect of the distance between two LC layers on the optical characteristics of the lens. The LC molecular orientation in the lens was altered by the acoustic radiation force generated by the lens’ resonance flexural vibration mode, causing a change in the focal length. The focal length change was increased dramatically, and the electrical consumption was reduced in lenses with thinner interlayers.</jats:p>

    DOI： 10.35848/1882-0786/aca0da

  • Varifocal Concave–Convex Lens Using Viscoelastic Gel and Ultrasound Vibration

    Shunsuke Hashimoto,Yuki Harada,Kosuke Nakamura,Takahiro Iwase,Jessica Onaka,Mami Matsukawa,Daisuke Koyama

    IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control   2022.9

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1109/TUFFC.2022.3194861

  • Relationship between liquid crystal layer thickness and variable-focusing characteristics of an ultrasound liquid crystal lens

    Takahiro Iwase,Jessica Onaka,Akira Emoto,Daisuke Koyama,Mami Matsukawa

    Japanese Journal of Applied Physics   2022.7

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.35848/1347-4065/ac48d1

  • Orientation angles of liquid crystals via ultrasound vibrations

    Takahiro Iwase,Yuma Kuroda,Jessica Onaka,Akira Emoto,Mami Matsukawa,Daisuke Koyama

    Japanese Journal of Applied Physics   2022.6

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    Publishing type：Research paper (scientific journal)   Publisher：{IOP} Publishing  

    DOI： 10.35848/1347-4065/ac6e1a

  • Optical evaluation of a double-layered ultrasound liquid crystal lens

    Jessica Onaka,Daisuke Koyama,Yuma Kuroda,Akira Emoto,Mami Matsukawa

    Journal of Applied Physics   2022.5

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0091093

  • Ultrasound liquid crystal lens with a variable focus in the radial direction for image stabilization

    Jessica Onaka,Takahiro Iwase,Akira Emoto,Daisuke Koyama,Mami Matsukawa

    Applied Optics   2021.11

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1364/AO.443945

  • Varifocal optical lens using ultrasonic vibration and thixotropic gel

    Daiko Sakata,Takahiro Iwase,Jessica Onaka,Daisuke Koyama,Mami Matsukawa

    The Journal of the Acoustical Society of America   149 ( 6 )   3954 - 3960   2021.6

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Acoustical Society of America ({ASA})  

    DOI： 10.1121/10.0005195

  • Ultrasound liquid crystal lens with enlarged aperture using traveling waves

    Jessica Onaka,Takahiro Iwase,Marina Fukui,Daisuke Koyama,Mami Matsukawa

    Optics Letters   46 ( 5 )   1169 - 1169   2021.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Optical Society  

    DOI： 10.1364/ol.414295

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Presentations

  • Ultrasonically controlled liquid crystal lens evaluation through optical measurements Invited International conference

    Optical Technology and Measurement for Industrial Applications 2024 (OPTM2024)  2024.4 

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    Event date： 2024.4

    Language：English   Presentation type：Oral presentation (invited, special)  

  • An ultrasound-driven liquid crystal lens paving the way for future tunable devices International conference

    2024.3 

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    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Country：India  

  • Evaluation of an ultrasonic liquid crystal lens Invited International conference

    International Conference in Optomechatronics Technology (ISOT)  2023.12 

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    Language：English   Presentation type：Poster presentation  

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