**About the Editors**

**Stefano Lupi**, Since 1992, Stefano Lupi has been involved in condensed matter research by using infrared and terahertz synchrotron radiation. His main research areas include: High-Tc Superconductors, strongly correlated materials, graphene, and topological materials. He developed the SISSI infrared beamline at Elettra Sincrotrone Trieste and the TERASPARC beamline at the Free Electron Laser SPARC at the INFN-LNF laboratory. Since 2015, he has cooperated with Osaka University on THz radiation and with the University of Science and Technology at Hefei on 3D Graphene and other aerogel materials. He was the visiting professor at the Elettra Sincrotrone Trieste and the University of Hamburg in 2010, and at the University of Milan in 2015. He is responsible for the SapienzaTerahertz laboratory work at Sapienza University on high-intensity THz radiation and pump-probe spectroscopy.

**Akinori Irizawa**'s main research areas are: infrared spectroscopy, photoemission spectroscopy, and solid-state physics. Since 2001, he has been involved in synchrotron radiation research, and since 2010, he has participated in free electron laser research at the Institute of Scientific and Industrial Research (ISIR) of Osaka University.

**Augusto Marcelli**, As a senior scientist at the Laboratori Nazionali di Frascati of the INFN since early 1980s, Augusto Marcelli has been involved in synchrotron radiation research. He contributed to the construction of beamlines at ADONE, DAΦNE, and ESRF. In particular, he proposed and built the first Italian infrared/THz beamline and until 2006, he was the scientist responsible for its operation. In 2019, he was appointed as a scientific expert on bilateral policies and activities for the internationalization of scientific and technological research of the Italian Ministry of Foreign Affairs. His main research areas include: correlation phenomena in X-ray absorption spectroscopy, circular magnetic X-ray dichroism investigations, X-ray absorption in elements of geophysical interest, dust and aerosol characterization, and ultra-trace detection for indoor and outdoor environmental research.
