Terakawa, Mitsuhiro

写真a

Affiliation

Faculty of Science and Technology, Department of Electronics and Electrical Engineering ( Yagami )

Position

Professor

E-mail Address

E-mail address

Related Websites
Scopus Paper Info  
Paper Count: 183 Citation Count: 1944 h-index: 24

Click to view the Scopus page. The data was downloaded from Scopus API in May 31, 2026, via http://api.elsevier.com and http://www.scopus.com .

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Career 【 Display / hide 】

  • 2005
    -
    2007

    Japan Society for the Promotion of Science, Doctoral Course Students (DC)

  • 2007
    -
    2008

    Japan Society for the Promotion of Science, Postdoctoral Fellow

  • 2007
    -
    2008

    Massachusetts General Hospital, Wellman Center for Photomedicine, Research Fellow

  • 2009
    -
    2010

    Keio University, Research Associate

  • 2010.04
    -
    2013.03

    Keio University, Department of Electronics and Electrical Engineering, Assistant Professor

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Academic Background 【 Display / hide 】

  • 2003.03

    Keio University, Science and Technology, Department of Electronics and Electrical Engineering

    University, Graduated

  • 2005.03

    Keio University, Science and Technology, Integrated Design Engineering

    Graduate School, Completed, Master's course

  • 2007.09

    Keio University, Science and Technology, Integrated Design Engineering

    Graduate School, Completed, Doctoral course

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Academic Degrees 【 Display / hide 】

  • 博士（工学）, 慶應義塾大学, 2007.09

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Matters concerning Career Achievements 【 Display / hide 】

  • 2013.04
    -
    2014.03

    電子工学科２年生担任

  • 2014.04
    -
    2015.03

    大学院総合デザイン工学専攻　専攻幹事

  • 2014.04
    -
    2015.03

    電子工学科３年生担任

  • 2015.04
    -
    2018.03

    大学院　研究科委員

  • 2016.04
    -
    2018.03

    大学院総合デザイン工学専攻　専攻幹事

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Research Areas 【 Display / hide 】

  • Nanotechnology/Materials / Optical engineering and photon science (laser processing, multi-photon manufacturing, softmaterials and biomaterials)

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Research Keywords 【 Display / hide 】

  • Laser processing

  • Soft materials

  • Biomaterials

  • Laser-induced carbonization and graphitization

  • Laser-based precise processing

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Books 【 Display / hide 】

  • Laser-Induced Carbonization and Graphitization. (in Handbook of Laser Micro- and Nano-Engineering)

    Mitsuhiro Terakawa, Springer Nature Switzerland AG, 2021.05

  • Laser-Induced Carbonization and Graphitization

    Terakawa M., Handbook of Laser Micro-and Nano-Engineering, 2021.01

    　View Summary

    This chapter presents the carbonization and graphitization of polymer materials through laser-based degradation to fabricate conductive structures. The fundamentals of degradation are first explained based on the thermal degradation and photodegradation of polymers to alter the chemical structures to form carbon-rich products. This process yields electrically conductive graphitic carbon under certain conditions. By using a laser as an energy source for the degradation, spatially targeted areas on bendable and stretchable elastomers can be altered to conductive structures that can be used in flexible electronics. Although laser-induced carbonization and graphitization can be traced back to the 1980s, research in this field was revived in the mid-2010s, and increased attention has been paid since then. Fundamental studies along with material analyses and applications of the formed conductive structures in various devices, such as supercapacitors, strain sensors, and bioelectronic devices, are also reviewed in this chapter. In addition, laser degradation of poly-dimethylsiloxane, which is a versatile polymer for flexible devices, and natural materials, such as cellulose, are highlighted as emerging precursors of laser-induced conductive structures.

  • Micro and Nano Fabrication Technology

    Mitsuhiro Terakawa, Springer, 2018

    Scope: Chapter "Femtosecond Laser Direct Writing"

  • Ultrafast Laser Processing: From Micro- to Nanoscale

    Mitsuhiro Terakawa, Minoru Obara, Pan Stanford Publishing, 2013

    Scope: Chapter 7 Nanoablation Using Nanosphere and Nanotip

  • Gold Nanoparticles: Properties, Characterization, and Fabrication

    Y. Tanaka, M. Terakawa, M. Obara, N. Nedyalkov, P. Atanasov, Nova Science Publishers, 2009

    Scope: Chapter 6 Plasmonic Nanopatterning of the Material Surface Mediated with Gold Nanoparticles Excited by a Femtosecond Laser Pulse

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Papers 【 Display / hide 】

  • Laser Direct Writing of Graphitic Carbon with Process-Tunable p- and n-Type Thermoelectric Response

    N. Yamaguchi, M. Terakawa

    ACS Applied Electronic Materials  2026.05

    Research paper (scientific journal), Joint Work, Last author, Corresponding author, Accepted

  • Laser Fabrication of Textile-Based Electrodes for Electrochemical Dye Removal

    Kasahara T., Terakawa M.

    Lasers in Manufacturing and Materials Processing  2026.04

    ISSN  21967229

    　View Summary

    Efficient removal of toxic and persistent dyes from water is crucial for water purification. A promising approach involves using carbon-based electrodes for electrolysis. In this process, increasing the electrode surface area enhances the interfacial contact between the electrode and the solution, thereby improving dye removal efficiency. Accordingly, electrode materials with high electrical conductivity and a large surface area are desired to further enhance dye removal efficiency. In this study, we report the fabrication of conductive and porous structures directly on textiles via laser-induced graphitization. Porous graphitic carbon structures were fabricated by laser irradiation of textiles immersed in a lignin dispersion, which induced laser-induced graphitization in the irradiated area. The fabricated structures were successfully applied as electrodes for the electrolytic removal of the model dye, methyl orange (MO), from an aqueous solution. Lignin was used as both a carbon precursor and a flame retardant by immersing the textiles in a lignin dispersion prior to laser irradiation. By controlling lignin concentration and laser irradiation conditions, graphitic carbon structures were fabricated that retained the macroscopic fiber bundle morphology and exhibited microscale porosity on bundle surfaces. The fabricated electrodes with high electrical conductivity and a porous structure enabled electrolytic removal of MO. Among the conditions investigated, electrodes fabricated at 10 wt% lignin and a laser scanning speed of 100 mm/s showed the highest removal amount (0.99 mg/g). The proposed method offers a facile, one-step route for fabricating water purification devices capable of efficient dye removal from aqueous solutions using laser irradiation on lignin-immersed textiles.

  • Laser direct writing of metal-organic framework-5 microstructures

    Ryo Moriyama, Makoto Makibuchi, Taishin Kasahara, Naoto Yamaguchi, Kosuke Fujiwara, and Mitsuhiro Terakawa

    Optics Letters (OPTICA Publishing)  51 ( 2 ) 361 - 364 2026.01

    Last author, Corresponding author, Accepted

  • Laser-Induced Graphitization on Hydrogel for Gel Electrolyte-Cathode Integrated Zinc–Air Batteries

    Kosuke Fujiwara, Mitsuhiro Terakawa

    The Journal of Physical Chemistry C (ACS Publications)  130 ( 1 ) 141 - 151 2025.12

    Research paper (scientific journal), Joint Work, Last author, Corresponding author, Accepted,  ISSN  19327447

    　View Summary

    Zinc–air batteries (ZABs) possess high energy density and utilize earth-abundant zinc, making them attractive candidates for next-generation sustainable energy storage devices. To meet the increasing demand for flexible power sources in wearable devices, flexible ZABs have been studied by integrating the cathode and gel electrolyte into a single structure. However, the conventional fabrication of such integrated structures often requires a complicated and multistep fabrication process, which increases manufacturing costs. In this study, a gel electrolyte-cathode integrated structure was fabricated in two steps. First, we fabricated graphitic carbon (GC) on the gel electrolyte by laser-induced graphitization of lignin-containing agarose hydrogel. Second, we added gold chloride solution dropwise onto GC to decorate GC with Au clusters. The performance of ZABs prepared with the structures decorated with Au clusters was improved, exhibiting higher open-circuit voltages and maximum power densities than those without Au cluster decoration. Furthermore, the Au clusters remained decorated on GC even after the drying–reswelling process, demonstrating that the prepared ZABs can function by reswelling even after drying. The new, simple method proposed in this study for fabricating a gel electrolyte-cathode integrated structure is expected to be an effective strategy for the practical application of flexible ZABs.

  • Fabrication of a hydrogel-based microstrip patch antenna by laser-induced graphitization

    Yuma Hattori, Mari Kato, Hiroaki Onoe, Mitsuhiro Terakawa

    Optical Materials Express (Optica)  15 ( 11 ) 2688 - 2698 2025.10

    Joint Work, Last author, Corresponding author, Accepted

    　View Summary

    Hydrogels have attracted attention as highly biocompatible supporting materials for wearable devices. An antenna is a key component for wireless transmission of information collected by the devices worn on the human body. Furthermore, integrating antennas into the devices eliminates the need for external wiring, which could obstruct the movement of the human body. In this study, we demonstrated the fabrication of planar conductive structures by laser-induced graphitization of tannic acid-containing alginate hydrogels and the fabrication of microstrip patch antennas (MPAs) using the fabricated structures. In a single laser scan onto the hydrogels, cracks were formed in the fabricated structures. For the fabrication of continuous planar structures, we used a method leveraging the water absorption property of hydrogels. By the method, in which an aqueous solution of tannic acid was added to the structures, followed by rescanning the laser beam to convert tannic acid to graphitic carbon, the number of cracks decreased. Additionally, it is confirmed that the fabricated structures can be applied to the radiation patches of hydrogel-based MPAs. A decrease in the resonant frequency of the fabricated MPAs corresponding to the decrease in the number of cracks is observed.

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Papers, etc., Registered in KOARA 【 Display / hide 】

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Reviews, Commentaries, etc. 【 Display / hide 】

  • Laser-based molecular delivery and its applications in plant science

    D. Heinemann, M. Zabic, M. Terakawa, J. Boch

    Plant Methods (Springer Nature)  18 ( 82 ) 1 - 14 2022.06

    Joint Work

  • レーザー炭化によるグラフェン生成とその新展開

    寺川光洋

    OPTORONICS 41 ( 484 ) 153 - 158 2022.04

    Article, review, commentary, editorial, etc. (other), Single Work, Lead author, Last author, Corresponding author

  • フェムト秒レーザー改質による高分子材料への導電性付与

    林秀一郎, 寺川光洋

    表面技術 71 ( 11 ) 684 - 688 2020.11

  • 超短パルスレーザーによる多光子還元

    寺川光洋

    光アライアンス 30 ( 8 ) 55 - 58 2019.08

    Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media), Single Work

  • Femtosecond Laser Processing of Biodegradable Polymers

    Mitsuhiro Terakawa

    Applied Sciences 8 ( 7 ) 1123 2018.07

    Article, review, commentary, editorial, etc. (scientific journal), Single Work

    　View Summary

    © 2018 by the authors. Biodegradable polymers have attracted increasing attention in tissue engineering and drug delivery systems owing to their high biocompatibility and biodegradability. Among the various methods for shape forming and modification of biodegradable polymers, laser processing has advantages in a dry processing approach that can process complex-shaped surfaces without using toxic chemical components. This review provides an overview of femtosecond laser processing of biodegradable polymers, especially in the last decade. The interaction mechanism of femtosecond laser pulse and biodegradable polymers, e.g., bond dissociation after laser irradiation, affects the degradable property of biodegradable polymers, which has the potential to control the degradation and sustainability of a structure. Applied studies on controlling cell behavior, tissue scaffolding, and drug release are also described.

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Presentations 【 Display / hide 】

  • （特別講演）フェムト秒レーザーを用いたソフトマテリアルへの導電性付与とその応用

    寺川光洋

    [Domestic presentation]  電気化学会第93回大会, 

    2026.03
    , 

    Oral presentation (invited, special)

  • Gold nanoparticle decoration on laser-fabricated graphitic carbon structures on hydrogel

    K. Fujiwara, M. Terakawa

    [International presentation]  Photonics West 2026, 

    2026.01
    , 

    Poster presentation

  • Fabrication of textile-based water purification devices via laser-induced graphitization

    T. Kasahara, M. Terakawa

    [International presentation]  Photonics West 2026, 

    2026.01
    , 

    Poster presentation

  • Direct Writing of CO2-responsive MOF-5/Graphitic Carbon Microstructures via Femtosecond Laser-Induced Graphitization

    Ryo Moriyama, Mitsuhiro Terakawa

    [International presentation]  2025 MRS Fall Meeting & Exhibit, 

    2025.11
    -
    2025.12
    , 

    Oral presentation (general)

  • Direct Writing of Laser-Induced Graphene Exhibiting n-Type Thermoelectric Behavior

    Naoto Yamaguchi, Mari Kato, Mitsuhiro Terakawa

    [International presentation]  2025 MRS Fall Meeting & Exhibit, 

    2025.11
    -
    2025.12
    , 

    Oral presentation (general)

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

  • スマートマテリアルに駆動力と機能を付与するレーザープロセシング技術の確立

    2022.04
    -
    2026.03

    文部科学省・日本学術振興会, 科学研究費補助金 基盤研究(B), No Setting

  • レーザプロセシングにより実現するエネルギー・ハーベスティング・デバイス

    2022.04
    -
    2024.03

    東電記念財団, 研究助成（基礎研究）, No Setting

  • 高繰り返しフェムト秒レーザパルス照射による高結晶性かつ高導電性微細構造の直接描画

    2021.09
    -
    2024.03

    天田財団, 重点研究開発助成　課題研究, No Setting

  • 回折限界を超える極微細金属構造のレーザーファブリケーション

    2018.07
    -
    2021.03

    文部科学省・日本学術振興会, 科学研究費補助金　挑戦的研究（萌芽）, Research grant, Principal investigator

  • 三次元多光子レーザープロセシングによる機能因子放出スキャフォールドの実現

    2018.04
    -
    2022.03

    文部科学省・日本学術振興会, 科学研究費補助金　基盤研究(B), Research grant, Principal investigator

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Intellectual Property Rights, etc. 【 Display / hide 】

  • レーザーを用いた薬剤放出方法

    Date applied： 2013-046732  2013.03 

    Patent

  • 移植組織または臓器への薬剤導入方法ならびに薬剤導入装置

    Date applied： 特願2007-196580  2007.07 

    Date announced： 特開2008-49150   

    Patent

  • Method and apparatus for drug delivery to tissue or organ for transplant

    Date applied：   2007 

    Date announced： US 2009/0233987 A1  2009 

    Patent

  • 細胞への薬剤導入方法および細胞への薬剤導入装置

    Date applied： 特願2006-113384  2006.04 

    Date announced： 特開2007-284379   

    Patent

  • 薬剤導入方法及び薬剤導入装置

    Date applied： 特願2004-147971  2004.05 

    Date announced： 特開2005-330194   

    Patent

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Awards 【 Display / hide 】

  • Optica Fellow

    2025.01, Optica

    　View Description

    For achievements in laser processing and functionalization of soft materials for electrical and optical applications

  • SPIE Fellow

    2023.01, SPIE (International Society for Optics and Photonics)

    Type of Award： Other

  • 電子・情報・システム部門研究会 優秀論文発表賞

    2014.09, 電気学会

  • 応用物理学会　講演奨励賞

    TERAKAWA Mitsuhiro, 2012.03, 応用物理学会, フェムト秒レーザの多微粒子レンズ集光場による細胞膜の単一パルスプロセッシング

    Type of Award： Award from Japanese society, conference, symposium, etc.

  • 慶應義塾大学 総合デザイン工学専攻 優秀研究活動賞 (博士)

    TERAKAWA Mitsuhiro, 2008.03

    Type of Award： Keio commendation etc.

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Other 【 Display / hide 】

  • 2017年11月

    　View Details

    The Optical Society (OSA) News Release: Metal-Silicone Microstructures Could Enable New Types of Flexible Optical and Electrical Devices

  • 2014年03月

    　View Details

    SPIE Newsroom: Femtosecond laser pulses for smart drug delivery

  • 2012年04月

    　View Details

    SPIE Newsroom: Ultrafast near- and far-field nanoablation patterning

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Courses Taught 【 Display / hide 】

  • GRADUATE RESEARCH ON INTEGRATED DESIGN ENGINEERING 1

    2026

  • INDEPENDENT STUDY ON INTEGRATED DESIGN ENGINEERING

    2026

  • ELECTRONICS AND ELECTRICAL ENGINEERING PRACTICAL RESEARCH ACTIVITIES B

    2026

  • SEMINAR IN ELECTRONICS AND INFORMATION ENGINEERING(1)

    2026

  • OPTICS AND QUANTUM ELECTRONICS

    2026

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Memberships in Academic Societies 【 Display / hide 】

  • Optica Fellow, 

    2025.01
    -
    Present

  • Fellow of SPIE, 

    2023.01
    -
    Present

  • SPIE, Senior Member, 

    2019.06
    -
    Present

  • Optica (formerly OSA), Senior Member, 

    2019.06
    -
    Present

  • Japan Laser Processing Society, 

    2013.04
    -
    Present

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Committee Experiences 【 Display / hide 】

  • 2026.04
    -
    2029.03

    多様化するレーザプロセシングとその応用調査専門員会　委員, 電気学会

  • 2025.04
    -
    2026.03

    主査（光加工・計測分科会） , 光産業技術振興協会　光技術動向調査委員会

  • 2025.02
    -
    2026.01

    Program Committee, Laser-based Micro- and Nanoprocessing XX, SPIE Photonics West 2026

  • 2025.02
    -
    2026.01

    Program Committee, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXVI, SPIE Photonics West 2026

  • 2024.07
    -
    2026.05

    レーザー学会東京支部委員, 一般社団法人レーザー学会

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