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- W2170216462 abstract "The propagation characteristics of true and leaky or pseudo surface acoustic waves (TSAW and PSAW=LSAW) on (n11) GaAs-cuts, n=1, 2, 3 and 4, are theoretically calculated as a function of propagation direction. They include phase velocity (V), electromechanical coupling constant (K/sup 2/), and attenuation factor (/spl alpha/) of wave propagation on a metallized surface. The results show that PSAW mode velocities are significantly higher than corresponding TSAW velocities, and for certain propagation directions the attenuation factor is extremely small (10/sup -5/ dB//spl lambda/). Highly coupled PSAW modes exist for propagation directions where the TSAW are very poorly coupled. For certain isolated directions, attenuation of the wave is null (/spl alpha/=0), PSAW becoming a non-leaky SAW with partial polarization. And in this case the corresponding TSAW are decoupled from the surface electric excitation. Analysis of relations between various modes (TSAW, PSAW and SSBW, surface skimming bulk wave) is made with the help of the effective surface permittivity function and the generalized slowness diagram. A coupling constant definition different from the usual 2/spl Delta/V/V is used, its validity and application conditions are discussed." @default.
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- W2170216462 date "1997-03-01" @default.
- W2170216462 modified "2023-09-26" @default.
- W2170216462 title "Theoretical study of surface acoustic waves in (n11) GaAs-cuts" @default.
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- W2170216462 doi "https://doi.org/10.1109/58.585125" @default.
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