Semiconductors 6 Solid state physics 6 Nonlinear optics 5 Photonics 5 Physics 5 Integrated optics 4 Nanotechnology 4 Quantum theory 4 Chemistry, Physical and theoretical 3 Dynamics 3 Optical properties 3 Optics 3 Plasma (Ionized gases) 3 Quantum optics 3 Acoustic surface waves 2 Cosmic physics 2 Diffraction 2 Elastic waves 2 Fiber optics 2 Gyrotrons 2 Heliosphere (Astrophysics) 2 Laser spectroscopy 2 Lasers 2 Magnetosphere 2 Nanostructured materials 2 Near-field microscopy 2 Nonlinear theories 2 Optical communications 2 Optical wave guides 2 Photoelectron spectroscopy 2