Related by context. Frequent words. (Click for all words.) 68 quartz crystals 63 quartz 58 resonators 57 resonator 56 waveguides 54 crystal oscillators 53 photodiode 53 ferrite 53 dopant 52 photodetector 52 sintered 52 #μm [002] 52 ceramic capacitors 52 zirconia 51 ceramic 51 semiconducting 51 waveguide 51 oscillators 50 Germanium 50 nanoscopic 50 crystal 50 PZT 50 crystals 50 oscillator 50 diffractive 50 aluminum oxide 50 indium phosphide 50 magnesium oxide 50 tungsten carbide 49 gallium arsenide 49 op amp 49 frequency comb 49 photonic crystal 49 InGaAs 49 electrode 49 exciton 49 isotropic 49 peridot 49 inductors 49 sapphire 49 silicon nitride 49 crystalline 49 silicon carbide 48 SiO2 48 photodetectors 48 alloy 48 resonant frequency 48 sine wave 48 silicon substrate 48 dopants 48 silicon 48 super alloys 48 TFTs 48 prismatic 48 rubidium 48 calcite 48 germanium 48 silicone rubber 48 diodes 48 iridium 48 thermistor 47 planar 47 nacre 47 coarse sand 47 metallic 47 luminescence 47 toroidal 47 alternating layers 47 capacitance 47 vacuum tube 47 salt crystals 47 geometries 47 tungsten 47 bandgap 47 sapphire crystal 47 laminations 47 carbide 47 titanium oxide 47 dielectrics 47 Tunable 46 crystalline structure 46 InGaN 46 tight tolerances 46 graphite 46 metal alloy 46 tunable lasers 46 tunable laser 46 phosphors 46 terahertz radiation 46 photonic crystals 46 olivine 46 photonic devices 46 electron mobility 46 dispersive 46 stator 46 interferometer 46 electrically conductive 46 micron sized 46 Neodymium 46 cubic zirconia 46 diode