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Vertical cavity surface emitting lasers with large aperture were fabricated by using wet oxidation technique at about 420°C, and the device chips were packaged with three different packaging methods. The optical output power and wavelength shift of the devices were compared experimentally. The device bonded with diamond spreader shows the best performance, and 200μm-diameter device produces a room...
In this study, the finite element method is employed to calculate SAW characteristics in (100) AlN/diamond based structures with different electrical interfaces; i.e., IDT/ AlN/diamond, AlN/IDT/diamond, IDT/AlN/thin metal film/ diamond, and thin metal film/AlN/IDT/diamond. The effects of Cu and Al electrodes as well as the thickness of electrode on phase velocity, coupling coefficient, and reflectivity...
Zinc oxide (ZnO) films were combined with diamond to be a composite surface acoustic wave (SAW) substrate showing high velocity and high coupling coefficient. In this study, Rayleigh SAW reflection characteristics of Cu or Al electrodes in (100) or (002) ZnO films on (111) diamond structures were analyzed using the finite element method (FEM). The resonance and anti-resonance frequencies obtained...
Propagation characteristics of surface acoustic waves (SAWs) in IDT/(100) AlN/diamond structures are analyzed in this study using the finite element method (FEM). The extracted coupling-of-mode (COM) parameters are employed to calculate the frequency responses of two-track SAW filters using the transmission matrix method. To enhance the sideband suppression, Chebyshev function is adopted to modify...
The surface acoustic waves (SAWs) propagating in interdigital transducer (IDT)/(100) aluminum nitride (AlN)/diamond possess the greater phase velocity and coupling coefficient than those in IDT/(002) AlN/diamond. In this study, the finite element method (FEM) is employed to calculate SAW characteristics in these two layered structures with different electric interfaces; i.e., IDT/AlN/diamond, AlN/IDT/diamond,...
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