Organized by
	Institute of Laser Engineering, Osaka University

	OPTICS & PHOTONICS International 2025 Congress

Supported by
	JSPS: Japan Society for the Promotion of Science

OBJECTIVE

Recent progress in high-power laser technology and the advent of X-ray free electron lasers have energetically advanced our understanding of matter in extreme environments. Materials dynamically compressed by high-power laser irradiation, which reach ultra-high pressure and temperature states or warm dense matter states, are closely related not only to plasma physics and material science but also to earth and planetary science and inertial confinement fusion researches. Since such materials are highly complex systems, they are interdisciplinary research interests where both experimental and computational contributions are essential. In the scientific research area, we recognize that it is beneficial to hold a conference to promote international and interdisciplinary collaboration and overview the current status and prospects of the related fields. Thus, we propose to hold an international conference at the annual HEDS meeting with a topical focus on "Matter in Extreme Conditions". The conference aims to discuss a definite theme with distinguished overseas scientists with experiences in high-pressure science, shock physics, materials science, earth and planetary science, first-principles calculations, high-power lasers, and X-ray free electron lasers, increasing the number of foremost participants in related fields.

INTERNATIONAL CONFERENCE ON HIGH ENERGY DENSITY SCIENCES 2025 (HEDS2025) is organized to share recent advances in science and technology on the matter under extreme high-energy-density conditions. The conference will be held on April 21-25, 2025, at Pacifico Yokohama, with the sponsorship of the Laser Society of Japan, and Institute of Laser Engineering, Osaka University.

SCOPE

HEDS covers the high energy density sciences with high power lasers and its application. The primary topics of HEDS2025 is on fast dynamics and transport in high energy density (HED) states.
High intensity lasers open access to fast dynamics in HED states, including phase transitions under high pressure, plasma and field structure formation, and energy transport in non-equilibrium conditions. Understanding these physics is essential for materials science, fusion energy science, astrophysics, and other applications. Novel diagnostics such as XFEL, and laser-driven particle and radiation sources are key to elucidating the physics.

The following categories are considered as specific topics.

     A. Plasma kinetics

     B. Warm dense matter and high pressure material

     C. Strong field and radiations

     D. Simulation and modeling

     E. Facility, diagnostics, and other technological advances

COMMITTEE MEMBERS

Conference Chair;
    Natsumi Iwata (Osaka Univ., Japan)
    Ryosuke Kodama (Osaka Univ., Japan)

Steering Committee Chair;
    Natsumi Iwata (Osaka Univ., Japan)

Program Committee;
    Motoaki Nakatsutsumi (European XFEL, Germany)
    Yuji Fukuda (QST, Japan)
    Yasunobu Arikawa (Osaka Univ., Japan)

CONFIRMED INVITED SPEAKERS

TBD

SUBMISSION

16 October 2024 - 18 December 2024

LOCATION OF CONFERENCE SITE

The HEDS2025 takes place online and at Pacifico Yokohama, Yokohama city, Kanagawa prefecture, JAPAN. Yokohama city, the center of Kanagawa prefecture is located south of Tokyo. Pacifico Yokohama is conveniently located about 40 min. by Limousine Bus from Haneda Airport and 90 min. from Narita Airport.