Magnetism Optical Materials 34 Optical materials 34 Condensed matter 33 Condensed Matter Physics 31 Nanotechnology 26 Classical Electrodynamics 20 Electrodynamics 20 Superconductivity 19 Superconductors 19 Engineering 18 Metals 18 Metals and Alloys 18 Technology and Engineering 18 Microwaves, RF Engineering and Optical Communications 16 Telecommunication 16 Characterization and Analytical Technique 14 Nanophysics 13 Nanoscience 13 Quantum Physics 13 Quantum physics 13 Spectroscopy 13 Spectrum analysis 13 Surfaces (Technology) 13 Surfaces, Interfaces and Thin Film 13 Thin films 13 Electronics 12 Electronics and Microelectronics, Instrumentation 12 Materials-Analysis 12 Physics 11