OPTO Symposium on Photon and Beam Science
OPTO2025 Symposium on Photon and Beam Science
The OPTO2025 Symposium on Photon and Beam Science was held on June 25–26, 2025, at the Convention Center, The University of Osaka (Suita Campus). Since 2017, the OPTO Symposium has been jointly organized by the Institute of Laser Engineering (ILE), The University of Osaka, and the Kansai Institute for Photon Science (KPSI), National Institutes for Quantum Science and Technology (QST). The symposium aims to strengthen collaboration between the two institutions and accelerate research and development in laser and photon science. This year’s event marked the 10th anniversary of the joint symposium and was held exclusively at the Suita Campus convention facility. It attracted approximately 160 participants.
The symposium featured six invited talks covering a broad range of topics in laser and photon science:
On Day 1, Dr. Nozomi Tanaka (ILE, U of Osaka) presented a study on the optimization of hydrogen radicals induced by intense extreme ultraviolet radiation for resolving bottlenecks in EUV lithography. Dr. Masaki Tsubouchi (KPSI, QST) introduced a quantum biological study of photosynthetic light-harvesting proteins through the integration of genetic recombination and ultrafast spectroscopy. Dr. Kazunori Serita (Graduate School of Information, Production and Systems, Waseda University) gave a talk on the development of a non-destructive 3D terahertz imaging technique for the cochlea, aimed at the early diagnosis of ear diseases.
On Day 2, Dr. Natsumi Iwata (ILE, U of Osaka) presented a theoretical study on dense plasma heating by a kJ petawatt laser. Dr. Noboru Hasegawa (KPSI, QST) discussed the development and social implementation of infrastructure inspection technologies using high-power lasers. Dr. Hiromitsu Kiriyama (KPSI, QST) reported on the current status and future prospects of the J-KAREN-P upgrade and ion acceleration experiments. All talks featured recent data and were followed by active discussions and Q&A sessions from the audience.
In the PLDX Activity Report, Dr. Shinsuke Fujioka (ILE, U of Osaka) shared recent developments involving digital technologies in laser applications.
At the Power Laser Community Meeting, Dr. Tetsuya Kawachi (Vice Director, QST) served as coordinator. Dr. Ryosuke Kodama (Director, ILE, U of Osaka) outlined Japan’s roadmap toward 2026. Prof. Shigemori (ILE) discussed plans for upgrading key facilities—Gekko XII, LFEX, SENJU, tritium targets, and the laser irradiation area in Building L—using MEXT’s 2024 supplementary budget. Dr. Hajima (Director, KPSI) presented findings on the cooling issues of mirrors and diffraction gratings used in high-repetition-rate, high-power lasers. Each topic was followed by lively discussions.
The poster session featured over 140 presentations. Many attendees enjoyed reconnecting with colleagues and alumni, creating a lively and warm atmosphere.
The 19th Kondo Prize Ceremony of Osaka University was held during the symposium.
The following researchers received the awards:
In the evening of the first day, a memorial gathering for the late Prof. Kuniokii Mima was held at the Senri Hankyu Hotel, accompanied by a commemorative lecture and dinner. It was a meaningful opportunity to reconnect with esteemed senior colleagues and reflect on Prof. Mima’s immense contributions. Many attendees expressed their renewed motivation to carry on his legacy.
Program
＊OPTO2025 Symposium Program is here
June 25 (Wed.)
・Invited Talk 1: Nozomi Tanaka (Institute of Laser Engineering, The University of Osaka)
Optimization of hydrogen radicals induced by intense extreme ultraviolet radiation for the EUVL bottleneck issue solutions
・Invited Talk 2: Masaaki Tsubouchi (Kansai Institute for Photon Science, QST)
Quantum biological study of light-harvesting proteins in photosynthesis by combining genetic recombination and ultrafast spectroscopy
・Invited Talk 3: Kazunori Serita (Graduate School of Information, Production and Systems, Waseda University)
Development of non-destructive 3D terahertz imaging technology of the cochlea for early diagnosis of ear diseases
・Poster session 1
June 26 (Thu.)
・Poster session 2
・Invited Talk 4: Natsumi Iwata (Institute of Laser Engineering, The University of Osaka)
Theoretical study on dense plasma heating by kJ petawatt laser
・Invited Talk 5: Noboru Hasegawa (Kansai Institute for Photon Science, QST)
Development and social implementation of infrastructure inspection technology using high-power lasers
・Invited Talk 6: Hiromitsu Kiriyama (Kansai Institute for Photon Science, QST)
Current status and prospects of the J-KAREN-P upgrade and ion acceleration experiments
・PLDX Activity Report: Shinsuke Fujioka (Institute of Laser Engineering, The University of Osaka)
・Community Meeting
The 19th Kondo Prize, The University of Osaka
<Research Paper Award (U30)>
- Kaoru Sugimoto (Kyoto University)
“Positron Generation and Acceleration in a Self-Organized Photon Collider Enabled by an Ultraintense Laser Pulse” - Kentaro Sakai (National Institute for Fusion Science)
“Development of time-resolved measurement method of multi-terahertz pulsed electric field vector waveforms”
<Research Paper Award (U40)>
- Takayuki Kurihara (The University of Tokyo)
“Discovery of ultrafast spontaneous spin switching in an antiferromagnet by femtosecond noise correlation spectroscopy”
2025 Best Poster Award
・ Mr. Yuta Tsutsumi (Kyoto Institute of Technology) (Photo in the middle / represented by Dr. Ishino in the photo)
・ Dr. Bentley Phillip David (KPSI, QST) (Photo on the left)
Poster Session
We look forward to another successful symposium and excellent research presentations next year!
(OPTO2025 Organizing Committee)
