Physics 207 Atoms 185 Atomic, Molecular, Optical and Plasma Physics 144 Plasma (Ionized gases) 130 Plasma Physics 101 Atoms and Molecules in Strong Fields, Laser Matter Interaction 53 Astrophysics 45 more ... Quantum Physics 45 Quantum physics 45 Lasers 43 Optics, Lasers, Photonics, Optical Devices 42 Photonics 42 Physical Chemistry 37 Physical chemistry 37 Astrophysics and Astroparticles 34 Plants 34 Chemical analysis 33 Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) 31 Space sciences 31 Mathematical physics 30 Nuclear physics 27 Mathematical Methods in Physics 26 Classical Electrodynamics 23 Electrodynamics 23 Nuclear fusion 23 Optics 23 Condensed Matter Physics 21 Condensed matter 21 Spectroscopy 19 Statistical physics 19 less ...