Related by context. Frequent words. (Click for all words.) 57 photoluminescence 56 X ray beam 55 spectrographs 53 photometer 53 pulsed laser 53 quadrupole 53 collimator 53 interferometers 53 absorbance 52 calorimeter 52 beamline 51 keV 51 photon 51 laser pulse 51 near infrared NIR 51 spectroscopic 51 photometry 51 X ray diffraction 51 microwave radiation 51 photometric 51 interferometer 51 phonon 50 attosecond 50 ultraviolet wavelengths 50 interferometry 50 neutron scattering 50 bandgap 50 synchrotron radiation 50 photodetector 50 alpha particles 49 optical microscopy 49 X ray beams 49 gamma ray 49 MeV 49 Keck telescope 49 electron laser 49 Raman spectroscopy 49 analyte 49 detector 49 Spectrometer 48 laser beam 48 NMR spectroscopy 48 Advanced Photon Source 48 gas chromatograph 48 National Synchrotron Light 48 beam splitter 48 interferometric 48 exciton 48 radial velocity 48 magnetic resonance NMR 48 positron 48 excitons 48 fluorophores 48 FRET 48 muon 48 antiprotons 47 photons 47 resonant frequency 47 photonic crystal 47 dopant 47 Ultrafast 47 FT IR 47 RGB LED 47 picosecond 47 gamma rays 47 spectrometry 47 diffraction 47 Impedance 47 responsivity 47 laser pulses 47 electron density 47 optical lattice 47 fluorescence imaging 47 infrared laser 47 electron 47 electromagnetic EM 47 elemental composition 47 frequency comb 47 transmission electron microscope 47 SQUID 47 particle detectors 47 confocal microscope 47 spectroscopy 47 quantum dot 47 scintillation 47 infrared spectroscopy 47 ion trap 47 particle detector 46 Photons 46 femtosecond laser 46 confocal 46 spectrometer 46 Terahertz 46 cosmic ray 46 joule 46 CCD camera 46 quantitative measurements 46 voltmeter 46 gravitational wave 46 isotropic 46 photoelectric effect