Artoni M.1,2, Horsley S.A.R.3, La Rocca G.C.4
1Department of Engineering and Information Technology, Brescia University, Brescia, Italy
2European Laboratory for Nonlinear Spectroscopy, Sesto Fiorentino, Italy
3School of Physics and Astronomy, University of Exeter, Exeter, United Kingdom
4NEST, Scuola Normale Superiore, Pisa, Italy
