The final, fifth day of the ELI Summer School focused on quantum aspects, ultrafast spectroscopy, and novel tools for exploring matter at the nanoscale. Participants had the opportunity to dive into groundbreaking advances in laser science and discover how these technologies open new horizons in studying ultrafast processes.
Topics discussed included:

• Quantum Aspects of High Harmonic Generation – Hamed Merdji (École Polytechnique, France)
• What Can We Learn from Looking Inside Nanoparticles with Intense XUV Light? – Maria Krikunova (Technische Hochschule Wildau, Germany)
• Attosecond and Soft-X-ray Spectroscopy of Liquids – Hans Jakob Wörner (ETH Zürich, Switzerland)
• Vibrational Dynamics of Electronically Excited Metal Complexes: Relaxation, Coherence, and Ultrafast Raman Spectroscopy – Antonin Vlček (Queen Mary University of London, UK / Czech Academy of Sciences, Czech Republic)
• Spectroscopic Mueller Matrix Ellipsometry for Control of Plasmonic and Dielectric Metasurfaces – Morten Kildemo (Norwegian University of Science and Technology, Norway)
• Ultrafast Momentum Microscopy – A Novel Tool for Imaging Charge and Spin Carriers in Solids on Ultrafast Timescales – Benjamin Stadtmueller (University of Augsburg, Germany)

The fifth day concluded the program, leaving participants inspired and with a renewed vision of the future of laser and quantum technologies. The closing of the school served as a powerful finale, highlighting the perspectives of further research in global science.

The ELI Summer School program continued with inspiring talks focused on space exploration, innovative chemistry and technology, and laboratory methods for recreating extreme cosmic conditions.
Topics discussed included:

• The Challenges of Missions to Inhospitable Places – Alessandro Atzei (European Space Agency, Netherlands)
• Space-Related Chemistry and Technology at Enceladus and Europa – Bernd Abel (Leipzig University, Germany)
• Warm Dense Matter: Creating Planets and Stars in the Laboratory – Dominik Kraus (University of Rostock, Germany)
• Hard X-ray Sources – Jens Uhlig (Lund University, Sweden)
• ELI Technologies – Hard X-ray Sources – Jaroslav Nejdl (ELI ERIC, Beamlines facility, Czech Republic)

The fourth day opened a window into the world of space missions, laboratory recreations of extreme states of matter, and the advancement of cutting-edge X-ray technologies. Once again, ELI proves to be a unique platform that unites diverse directions of modern science.

The ELI Summer School program continued with inspiring talks dedicated to the latest advances in nuclear physics, particle accelerators, and medical applications of laser technologies.
Topics discussed included:

• Progressing Nuclear Physics by Facilitating the Unique Beam Features of High-Power Laser Systems – The Dawn of a New Era – Klaus Spohr (ELI NP, Romania)
• GeV Compton Photons Generated with Multi-PW Lasers – Petru Ghenuche (ELI NP, Romania)
• Laser-Driven Ion Acceleration – Alessandro Maffini (Politecnico di Milano, Italy)
• Laser Plasma-Based Nuclear Reactions and Plasma Diagnostics – Daniele Margarone (ELI ERIC, Beamlines facility, Czech Republic)
• Medical Applications and Capabilities at ELI – Katalin Hideghéty (University of Szeged & ELI ERIC, ALPS facility, Hungary)
• An Ultra-Short Story of Laser Wakefield Accelerator – Victor Malka (Weizmann Institute of Science, Israel & ELI NP, Romania)
• ELI Electron Acceleration Technology – Gabriele Grittani (ELI ERIC, Beamlines facility, Czech Republic)

The day provided a unique opportunity to explore the development of laser-plasma accelerators, their potential for fundamental research, and perspectives for practical applications – from medicine to new methods in nuclear physics. Even more exciting discussions and discoveries lie ahead!