Related by context. Frequent words. (Click for all words.) 77 laser pulse 69 photons 65 photon 63 wavelengths 61 magnetic fields 61 gamma rays 60 laser beams 58 electrons 58 infrared radiation 57 atoms 57 nanotubes 57 quantum dots 57 neutrons 57 infrared laser 56 wavelength 56 spectra 56 electromagnetic waves 56 electron 56 protons 56 pulses 55 infrared wavelengths 55 lasers 55 fluorescence 55 nuclei 55 electrical currents 55 hydrogen atoms 55 ions 55 laser beam 55 electron beam 54 excitation 54 ionosphere 54 quantum dot 54 gravitational waves 54 waveguide 54 ionization 54 qubit 54 gamma ray burst 54 diffraction 54 cosmic ray 53 nanocrystals 53 nanostructures 53 cosmic rays 53 nanorods 53 molecules 52 neutrinos 52 metamaterial 52 optical fibers 52 vibrational 52 ultraviolet light 52 distant galaxies 52 cosmic microwave background 52 nanowires 52 electrical impulses 52 galaxy clusters 52 neutron 52 particles 52 resonators 52 spectroscopic 52 DNA strands 52 nanotube 51 nanowire 51 proton 51 spectroscopy 51 gamma ray bursts 51 filaments 51 gamma ray 51 electrical pulses 51 oscillations 51 nanometer scale 51 redshift 50 terahertz 50 carbon nanotubes 50 intensities 50 resonator 50 subatomic particles 50 millionths 50 supernovae 50 atomic particles 50 nanostructure 50 oxygen atoms 50 tunable 50 UV light 50 molecule 50 waveforms 50 adaptive optics 50 filament 49 infrared 49 photonic 49 neutrino 49 quasars 49 diodes 49 quantum mechanical 49 organic molecules 49 magnetosphere 49 quasar 49 auroras 49 nanoparticles 49 refractive index 49 Very Large Telescope 49 spatial resolution 49 Electrons