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In-plane wave propagation in layered piezoelectric phononic crystals composed of functionally graded interlayers arisen from the solid diffusion is considered in the present work. Wave transmission and band-gaps due to the material gradation and incident wave-field are investigated. A classification of band-gaps in layered piezoelectric functionally graded phononic crystals is proposed. The classification...
Broadband green light source using a 5.5-mm-long tandem PPLN was demonstrated. The measured wavelength and temperature bandwidth were 13nm and 100°C, respectively, which had 34.2 times broader spectral bandwidth than periodic one.
The objective of this study is to validate two-dimensional (2D) myocardial elastography estimates in canine hearts in vivo against direct sonomicrometry measurements at variable levels of myocardial ischemia induced by the occlusion of the left anterior descending (LAD) coronary artery. Two-dimensional myocardial elastography comprised transmural: 1) 2D (lateral and axial) displacements using 1D cross-correlation...
Blue light-induced infrared absorption is investigated in bulk and periodically poled KTiOPO4, MgO:stoichiometric-LiNbO3, MgO:stoichiometric-LiTaO3, KNbO3. KNbO3 and MgO:stoichiometric-LiNbO3 show the lowest susceptibility to the induced absorption. Periodic poling increases the susceptibility in KTiOPO4 and MgO:stoichiometric-LiTaO3.
An effective means of achieving a portable, ultrafast blue-light source using a variety of nonlinear media is demonstrated. We investigate the relative merits of aperiodically-poled bulk and waveguide nonlinear crystals in comparison to periodically-poled structures.
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