Optical Materials Optical materials 30 Surface and Interface and Thin Film 30 Surfaces (Physics) Surfaces (Technology) 15 Surfaces, Interfaces and Thin Film 15 Thin films 15 Laser 12 Lasers 12 Nanophysics 8 Nanoscience 8 Semiconductors 8 Microelectromechanical systems 6 Microsystems and MEMS 6 Microtechnology 6 Microwaves, RF Engineering and Optical Communications 5 Nanotechnology 5 Spectroscopy 5 Spectrum analysis 5 Telecommunication 5 Soft and Granular Matter 3 Soft condensed matter 3 Condensed Matter Physics 2 Condensed matter 2 Electrochemistry 2 Electronic Circuits and Systems 2 Electronic circuits 2 Mathematical physics 2 Nanochemistry 2 Theoretical, Mathematical and Computational Physics 2