SAW propagation on proton-exchanged lithium niobate

A novel method using only the easily measured velocity of SAWs (surface acoustic waves) is demonstrated for determination of elastic constants of anisotropic layers on arbitrarily anisotropic and piezoelectric substrates. The elastic constants and propagation properties of any nonpiezoelectric isotropic, cubic, or even trigonal layer on an arbitrarily anisotropic substrate can be determined with this method. The method was applied to proton-exchanged (PE) lithium niobate in order to determine its as yet unknown elastic constants. Dispersion curves and elastic stiffness constants of PE Y-cut LiNbO3 have been evaluated. The results are reliable for waveguides fabricated in diluted melts containing 0.25-2.00 mol.% lithium benzoate. Using the obtained elastic-stiffness constants, SAW propagation properties such as power flow, diffraction, and strain distribution can be analyzed in order to achieve sophisticated design of guided SAW and acoustooptic devices based on PE:LiNbO3 waveguides     «

A novel method using only the easily measured velocity of SAWs (surface acoustic waves) is demonstrated for determination of elastic constants of anisotropic layers on arbitrarily anisotropic and piezoelectric substrates. The elastic constants and propagation properties of any nonpiezoelectric isotropic, cubic, or even trigonal layer on an arbitrarily anisotropic substrate can be determined with this method. The method was applied to proton-exchanged (PE) lithium niobate in order to determine it...     »

lithium compounds, surface acoustic waves, dispersion relations, surface acoustic wave devices, ultrasonic propagation, acoustic waveguides, diffraction, power flow, dispersion curves, piezoelectric substrates, elastic constants, acousto-optical devices, elastic stiffness constants, proton exchanged LiNbO3, acoustooptic devices, anisotropic layers, anisotropic substrate, diluted melts, guided SAW devices, LiNbO3 waveguides, lithium benzoate, SAW propagation properties, strain distribution, surface acoustic wave velocity     «

lithium compounds, surface acoustic waves, dispersion relations, surface acoustic wave devices, ultrasonic propagation, acoustic waveguides, diffraction, power flow, dispersion curves, piezoelectric substrates, elastic constants, acousto-optical devices, elastic stiffness constants, proton exchanged LiNbO3, acoustooptic devices, anisotropic layers, anisotropic substrate, diluted melts, guided SAW devices, LiNbO3 waveguides, lithium benzoate, SAW propagation properties, strain distribution, surfa...     »