Related by context. Frequent words. (Click for all words.) 61 photoluminescence 60 interferometric 59 paramagnetic 59 interferometers 58 infrared wavelength 58 ultraviolet wavelengths 58 absorbance 58 ionisation 58 InGaAs 58 isotropic 57 nm wavelength 57 microwave radiation 57 photosphere 57 photometer 57 tropospheric 56 optical wavelengths 56 keV 56 thermally stable 56 fluorescence microscope 56 visible wavelengths 56 collimated 56 electron density 55 microwave frequencies 55 Impedance 55 diffracted 55 near infrared NIR 55 dispersive 55 toroidal 55 nonlinearity 55 cm -1 55 electromagnetically 55 submicron 54 spectrographs 54 shorter wavelengths 54 obscuration 54 Fourier transform 54 photonic crystal 54 interferometry 54 excitations 54 nanobubbles 54 millivolts 54 Tunable 54 infrared 54 spectral imaging 54 optical lattice 54 Spectrometers 54 wavelengths 54 photodetector 54 solar corona 54 picoseconds 54 MeV 53 laminar 53 #μm [002] 53 amplitudes 53 #um [002] 53 anisotropic 53 directivity 53 Pulsed 53 collimator 53 fused silica 53 polar vortex 53 ionised 53 #.#μm [001] 53 spectra 53 responsivity 53 dielectric materials 53 tunability 53 input impedance 52 Ultraviolet radiation 52 HD# [005] 52 micrometres 52 μm 52 photochemistry 52 helium atoms 52 femtoseconds 52 Oscillation 52 nanoporous 52 transmittance 52 z axis 52 exosphere 52 galaxy NGC 52 frequency comb 52 microlenses 52 spectrally 52 antenna arrays 52 ionized gas 52 beam splitter 52 irradiance 52 singlemode 52 panchromatic 52 anisotropy 52 Gamma rays 52 phonon 52 GeV 52 ionospheric 52 waveguide 52 tuneable 52 plasmon 52 picosecond 52 Transducer 52 -# degrees Fahrenheit [002]