1. Leibniz Institute of Photonic Technology and Member of Leibniz Research Alliance “Health Technologies”, Albert-Einstein-Strasse 9, 07745 Jena, Germany
2. National Institute of Optics, National Research Council (CNR-INO), Largo E. Fermi 6, 50125 Florence, Italy
3. European Laboratory for Non-Linear Spectroscopy (LENS), University of Florence, Via Nello Carrara 1, 50019 Sesto Fiorentino, Italy
4. Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-University, Helmholtzweg 4, 07743 Jena, Germany