Understand the interaction process between intense laser light and matter, Explore technology for material control.

Objective

Our research interest is focused on understanding the light-matter interaction process with intense femtosecond laser pulses and the applications to pioneering new fields of photon energy technology. We are challenging material control in nanometer-scale size.

Ultrafast dynamics in laser material NANOprocessing

We have reported the first evidence of excitation of surface plasmon polaritons on nonmetallic materials with intense femtosecond (fs) laser pulses, as the intense fs laser pulse produces a high density of free electrons to form a metal-like layer on the surfaces. The experimental results have demonstrated the generation of enhanced near fields for the periodic ablation of the surfaces.

A novel technique for laser material NANOprocessing

The near-fields of SPPs excited with intense fs laser pulses can sculpt homogeneous periodic nanostructures on the materials. Based on the physical model proposed, our goal is development of novel technique for laser material nanoprocessing.

Godai Miyaji, Ph.D.

CV and our equipment

E-mail: gmiyaji@cc.tuat.ac.jp

Optica, SPIE, OSJ, IEEJ, JSAP, LSJ, JLPS members

Tokyo University of Agriculture & Technology, Japan

Faculty of Engineering, 

Department of Applied Physics and Chemical Engineering

Journal papers

International contribution

  • Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXX in SPIE. Photonics West 2025 Co-Chair

  • Conference on Laser Ablation (COLA 2024) Co-Chair

  • Journal of Laser Micro/Nanoengineering Editor

  • CLEO Pacific Rim 2024 Program Committee

  • The 15th International Conference on Information Optics and Photonics(CIOP 2024) Program Subcommittee

  • The 5th Smart Laser Processing Conference 2024 (SLPC2024) Program Committee

  • The 4th International Workshop on Frontiers in Lasers and Applications (FLA-4) Steering Committee

  • Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXIX in SPIE. Photonics West 2024 Co-Chair

  • 3rd International Workshop on Frontiers in Lasers and Applications (FLA-3) Steering Committee Chair
  • The 14th International Conference on Information Optics and Photonics(CIOP 2023) Program Subcommittee
  • The 24th International Symposium on Laser Precision Microfabrication (LPM2023) Steering Committee
  • Conference on Laser Ablation (COLA 2021/2022) Organizing Committee
  • The 12th Asia-Pacific Laser Symposium (APLS2022) Program Committee
  • The 22nd International Symposium on Laser Precision Microfabrication (LPM2021) Steering Committee
  • CLEO Pacific Rim 2022 Program Committee
  • 2nd International Workshop on Frontiers in Laser and Applications (FLA2021) Steering Committee
  • 1st International Workshop on Frontiers in Laser and Applications 2018 Steering Committee
  • Optics & Photonics International Congress (OPIC2017) Steering Committee
  • Advanced Lasers and Photon Sources (ALPS’17) in OPIC2017 Secretariat
  • Advanced Lasers and Photon Sources (ALPS’16) in OPIC2016 Secretariat

Invited talks (international conference only)

  • [Keynote] G. Miyaji, " Direct surface nanopatterning with few-cycle femtosecond laser pulses", International Workshop on Frontiers in Lasers and Applications (FLA-4), Okinawa, Japan, 8 Jul., 2024.

  • G. Miyaji, Y. Iida, S. Nikaido, and A. Ishihara, "Fine-periodic nanostructure formation on solids with few-cycle femtosecond laser pulses", the Conference on Lasers and Electro-Optics (CLEO), Charlotte, USA, 6 May, 2024.

  • [Keynote] G. Miyaji, "Direct Surface Nanopatterning with Intense Femtosecond-Laser-Induced Plasmonic Near-Fields", 4th International Conference on Optics, Photonics, and Lasers (OPL-2023), Hiroshima, Japan, 4 Dec., 2023.

  • G. Miyaji, "Direct nanopatterning by surface plasmons excited with intense femtosecond laser pulses", 12th International Conference on Photo-Excited Processes and Applications (ICPEPA-12), Suzhou, China, 20 Sep., 2023.

  • G. Miyaji, "Fundamental physical process of surface plasmon polaritons on non-metallic material with an intense ultrashort laser pulse", International Workshop on Laser Material Processing and Applications (LMPA 2023), Takayama, Japan, 5 Sep., 2023.

  • [Keynote] G. Miyaji, "Improvement of Optical Transmittance of Glass by Direct Nanopatterning with Femtosecond-Laser-Induced Plasmonic Near-Fields", International Workshop on Frontiers in Lasers and Applications (FLA-3), Nassau, The Bahamas, 9 Dec., 2022.

  • G. Miyaji, "Nanopatterning on Solid Surfaces by Femtosecond-Laser-Induced Plasmonic Nearfields", The 13th International Conference on Information Optics and Photonics (CIOP2022), Web, 10 Aug, 2022.
  • [Keynote] G. Miyaji, "Direct nanopatterning on solid surfaces with femtosecond-laser-induced plasmonic near-fields", International Workshop on Frontiers in Lasers and Applications (FLA-2), Web, 28 June, 2021.
  • G. Miyaji, "Direct nanofabrication on solids with plasmonic near-field ablation induced by femtosecond laser pulses", 39th International congress on applications of lasers & electro-optics (ICALEO 2020), Web, 20 Oct, 2020.
  • G. Miyaji, S. Nikaido, T. Natori, and R. Saito, "Origin of fluence dependence of periodicity in nanostructuring on diamond-like carbon films with femtosecond laser pulses", International Conference on Ultrafast Optical Science (UltrafastLight-2019), Moscow, Russia, 1 Oct, 2019.
  • [Keynote] G. Miyaji, M. Hagiya, D. Moriyama, S. Nikaido, T. Natori, and R. Saito, "SURFACE NANOFABRICATION WITH FEMTOSECOND-LASER-INDUCED PLASMONIC NEAR-FIELDS", IAPLE conference 2019, Hokkaido, Japan (2019).
  • G.Miyaji, M.Hagiya, and D.Moriyama, "Characterization of surface plasmons inducing nanoablation on nonmetallic materials excited with intense femtosecond laser pulses", Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIX in Photonics West 2019, San Francisco, USA (2019).
  • G.Miyaji, "Controlling of plasmon damping on nonmetallic gratings excited with intense femtosecond laser pulses", International Conference on Ultrafast Optical Science (UltrafastLight-2018), Moscow, Russia.
  • G.Miyaji, Talk about laser nanofabrication, Private seminar in Laser-Laboratorium Göttingen e.V. (LLG), Göttingen, Germany (2018).
  • G.Miyaji, "Excitation of surface plasmon polaritons on non-metallic materials with intense femtosecond laser pulses and its application to nano-processing", 19th International Symposium on Laser Precision Microfabrication (LPM2018), Edinburgh, Scotland (2018).
  • [Keynote] G.Miyaji, "Observation of surface plasmon polaritons on nonmetallic materials excited with intense femtosecond laser pulses", International Workshop on Frontiers in Lasers and Applications (FLA2018), Okinawa, Japan (2018).
  • G.Miyaji, "Nanoablation of Si surface with femtosecond-laser-induced plasmonic near-fields", Laser-Based Micro- and Nano- Processing XII in Photonics West 2018, San Francisco, USA (2018).
  • G.Miyaji, "Plasmonic near-fields ablation on Si induced with an intense femtosecond laser pulse", International Conference on Ultrafast Optical Science (UltrafastLight-2017) (2017).
  • G.Miyaji and K.Miyazaki, "Nanograting formation in air through plasmonic near-field ablation induced by femtosecond laser pulses", LAMOM XXII in Photonics West 2017 (2017).
  • G.Miyaji and K.Miyazaki, "Nanostructure formation processes in femtosecond laser ablation of thin film surfaces", LAMOM IV in Photonics West 2009 (2009).