Related by context. Frequent words. (Click for all words.) 65 collimated 63 pulsed laser 63 photoluminescence 61 shorter wavelengths 60 fluorescence microscope 60 diffractive 60 photodiodes 60 polarizing filter 60 collimator 60 near infrared NIR 60 X ray beam 59 photonic crystal 59 diffracted 59 plasmon 59 beam splitter 58 dispersive 58 diffraction pattern 58 aspheric 58 photodetectors 57 photodetector 57 eyepieces 57 microlenses 57 electron beams 57 terahertz radiation 57 infrared wavelength 57 specular 57 photonic crystals 57 microscopy techniques 57 TFTs 56 superlens 56 InGaAs 56 transmissive 56 ion beams 56 interferometers 56 emissivity 56 irradiance 56 optical microscopes 56 magnifications 56 photodiode 56 LED arrays 56 optically 56 visible wavelengths 55 wavefront 55 optical microscopy 55 directivity 55 fluorescent molecules 55 fused silica 55 tuneable 55 keV 55 electrophoretic 55 #μm [002] 55 nm wavelength 55 VCSELs 55 aperture 55 laser pulses 55 frequency comb 55 fluorophores 55 ultrasonic waves 55 spectrally 54 paramagnetic 54 piezo electric 54 waveguides 54 InGaN 54 interferometric 54 luminous flux 54 titania 54 semiconductor nanocrystals 54 bandgap 54 parallax barrier 54 absorbance 54 diffraction limit 54 spherical aberration 54 spectral imaging 54 piezoelectric materials 54 helium atoms 54 waveguide 54 zinc oxide nanowires 53 RGB LED 53 Live MOS sensor 53 crystallinity 53 CCD sensors 53 phosphors 53 photometry 53 optical wavelengths 53 gravitational lens 53 dye molecules 53 CMOS sensors 53 X ray beams 53 CCD camera 53 isotropic 53 light emitting diodes LEDs 53 apertures 53 nanobubbles 53 spectrographs 53 diffraction 53 curved surfaces 53 negative refraction 53 interferometry 53 optical coatings 53 CCFLs 52 #μm [001]