Quantum optics 37 Quantum theory 11 Semiconductors 7 Nanostructured materials 6 Photonics 6 Physics 6 Lasers 5 Materials science 5 Nanophotonics 5 Quantum dots 5 Semiconductor lasers 5 Nanotechnology 4 Nonlinear optics 4 Quantum wells 4 Mathematical physics 3 Near-field microscopy 3 Optical communications 3 Optics 3 Quantum computers 3 Quantum electronics 3 Solid state physics 3 TECHNOLOGY & ENGINEERING / Lasers & Photonics 3 Atomic, Molecular, Optical and Plasma Physics 2 Biophysical Phenomena 2 Electromagnetism 2 Integrated circuits 2 Laser spectroscopy 2 Light & paraphotic phenomena (Optics); Physics 2 Light-Harvesting Protein Complexes 2 Mathematical models 2