Author Affiliations

Wenlong Tian,^1,2,*,† Giovanni Cirmi,^1,3,† Halil T. Olgun,^1,† Patrick Mutter,⁴ Carlota Canalias,⁴ Andrius Zukauskas,⁴ Lu Wang,^1,5 Elias Kueny,¹ Frederike Ahr,¹ Anne-Laure Calendron,^1,3 Fabian Reichert,⁵ Kore Hasse,^3,6 Yi Hua,^1,3 Damian N. Schimpf,¹ Hüseyin Çankaya,^1,3,5 Mikhail Pergament,¹ Michael Hemmer,¹ Nicholas Matlis,¹ Valdas Pasiskevicius,⁴ Fredrik Laurell,⁴ and Franz X. Kärtner^1,3,5

¹Center for Free-Electron Laser Science (CFEL), Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany

²School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China

³The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany

⁴Department of Applied Physics, KTH, Royal Institute of Technology, Roslagstullsbacken 21, 10691 Stockholm, Sweden

⁵Physics Department, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany

⁶Institut für Laser-Physik, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany

^†These authors contribute equally to this Letter.

^*Corresponding author: wltian@xidian.edu.cn

ORCID

Wenlong Tian	https://orcid.org/0000-0002-2965-0811
Giovanni Cirmi	https://orcid.org/0000-0002-6435-353X
Lu Wang	https://orcid.org/0000-0002-3488-943X
Elias Kueny	https://orcid.org/0000-0001-5715-1772
Anne-Laure Calendron	https://orcid.org/0000-0003-4857-9691
Kore Hasse	https://orcid.org/0000-0003-0657-5027
Hüseyin Çankaya	https://orcid.org/0000-0001-7262-8831
Michael Hemmer	https://orcid.org/0000-0002-8614-8203
Franz X. Kärtner	https://orcid.org/0000-0001-8829-5461