Author Affiliations

Guoqing Chang,^1,2,3,* Chih-Hao Li,⁴ Alexander Glenday,⁴ Gabor Furesz,⁴ Nicholas Langellier,⁴ Jinkang Lim,³ Hung-Wen Chen,³ David F. Phillips,⁴ Dimitar Sasselov,^4,5 Andrew Szentgyorgyi,⁴ Ronald L. Walsworth,^4,5 and Franz X. Kärtner^1,2,3,6

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

²Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA

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

⁴Harvard-Smithsonian Center for Astrophysics, Harvard University, 60 Garden St. Cambridge MA 02138

⁵Department of Physics, Harvard University, 60 Garden Street, Cambridge, Massachusetts 02138, USA, USA

⁶Physics Department, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany

^*Corresponding author: guoqing.chang@desy.de