Classical Electrodynamics Physics 20 Optics, Lasers, Photonics, Optical Devices 11 Microwaves 9 Microwaves, RF and Optical Engineering 9 Optical engineering 9 Electronics 6 Nanotechnology 5 Engineering 4 Materials 4 Nanotechnology and Microengineering 4 Optical and Electronic Materials 4 Optical materials 4 Quantum Optics 4 Quantum optics 4 Acoustics 3 Classical Mechanics 3 Classical and Quantum Gravitation, Relativity Theory 3 Gravitation 3 Hearing 3 Nanoscale Science and Technology 3 Nanoscience 3 Nanostructures 3 Numerical and Computational Physics, Simulation 3 Sound 3 Atoms 2 Atoms and Molecules in Strong Fields, Laser Matter Interaction 2 Electronic circuits 2 Electronics and Microelectronics, Instrumentation 2 Elementary Particles, Quantum Field Theory 2