Author Affiliations

S. Checcucci,^*,1,2,3,4 P. E. Lombardi,^1,2,3 S. Rizvi,^1,2 F. Sgrignuoli,^1,3 N. Gruhler,⁵ F. B. C. Dieleman,⁶ F. S. Cataliotti,^1,3,4 W. H.P. Pernice,^5,7 M. Agio,^1,2,4,8 and C. Toninelli^1,2,4

¹European Laboratory for Nonlinear Spectroscopy (LENS), Sesto Fiorentino, Italy

²National Institute of Optics (INO-CNR), Florence, Italy

³Department of Physics and Astrophysics, University of Florence, Sesto Fiorentino, Italy

⁴Center for Quantum Science and Technology in Arcetri (QSTAR), 50125 Florence, Italy

⁵Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, 76344, Germany

⁶The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, United Kingdom

⁷Institute of Physics, University of Muenster, Muenster 48149, Germany

⁸Laboratory of Nano-Optics, University of Siegen, Siegen, Germany

^*Corresponding author: checcucci@lens.unifi.it