**About the Editor**

**Gr ´egory Barbillon** completed his Ph.D. in Physics (2007) with greatest distinction at the University of Technology of Troyes (France). He then obtained his Habilitation (HDR) in Physics (2013) at the University of Paris Sud (Orsay, France). He has been a Professor of Physics at the Graduate School of Engineering "EPF-Ecole d'Ingenieurs" (Cachan, France) since ´ his appointment in September 2017. His research interests focus on Plasmonics, Nano-Optics, Non-Linear Optics, Biosensing, Optical Sensing, Condensed Matter Physics, Nanophotonics, Nanotechnology, Nanomaterials, Surface Enhanced Spectroscopies, Sum Frequency Generation Spectroscopy, Materials Chemistry, Physical Chemistry, and Fluorescence.
