Author Affiliations

G. Fumero,^a,*,# C. Schnedermann,^b,c,* G. Batignani,^a T. Wende,^b M. Liebel,^b,d G. Bassolino,^b C. Ferrante,^a,e S. Mukamel,^g P. Kukura,^b and T. Scopigno^a,f

^aSapienza, University of Rome, Italy

^bUniversity of Oxford, UK

^cUniversity of Cambridge, UK

^dInstitut de Ciencies Fotoniques, Spain

^eENEA C. R. Casaccia, Italy

^fIstituto Italiano di Tecnologia, CLNS-Sapienza, Italy

^gUniversity of California, Irvine, USA

^*equally contributed.

^# giuseppe.fumero@uniroma1.it