Related by context. Frequent words. (Click for all words.) 61 terahertz radiation 60 shorter wavelengths 58 Terahertz 57 electron beams 57 microwave radiation 56 ultrasonic waves 56 X ray beams 55 photoluminescence 55 pulsed laser 55 electromagnetic waves 55 synchrotron radiation 55 interferometers 55 optical wavelengths 55 ultraviolet wavelengths 55 Gamma rays 55 infrared radiation 55 Cosmic rays 55 interferometric 55 electrically conducting 55 fluorophores 54 infrared 54 X ray beam 54 terahertz 54 electromagnetic pulses 54 near infrared NIR 54 solar corona 54 ionised 54 stimulated emission 54 radiotracer 54 visible wavelengths 53 ionizing 53 interferometry 53 photodetector 53 sensor arrays 53 Ultraviolet light 53 nanosensor 53 infrared laser 53 Nanotube 53 lasers 52 chemiluminescent 52 plasmons 52 ionisation 52 plasmonic 52 gamma rays 52 THz 52 diffractive 52 infrared rays 52 X ray emission 52 gold nanorods 52 photodetectors 52 spectrometry 52 fluorescent molecules 52 microwave frequencies 52 entangled photons 52 confocal microscope 52 ionize 52 electromagnetic 52 spectroscopic 52 laser beam 52 gravitational wave 52 bioluminescence 52 plasmonics 51 alpha particles 51 keV 51 Pulsed 51 fluorescent probes 51 Ultrafast 51 magnetic fields 51 muon 51 porous silicon 51 ultrasonics 51 phonon 51 gamma ray 51 photons 51 quantum dot 51 excitons 51 laser pulses 51 photonic crystals 51 SQUID 51 millimeter wave 51 dye molecules 50 scanning electron microscopy 50 x ray imaging 50 laser beams 50 MeV 50 Photons 50 laser pulse 50 waveguides 50 Hawking radiation 50 X ray fluorescence 50 Quantum dots 50 biological molecules 50 waveguide 50 optical biosensors 50 nanocrystal 50 optical microscopy 50 Metamaterials 50 spectroscopy 50 ionized gas 50 infrared detectors 50 isotropic