By Dr. Sergey V. Biryukov, Prof. Yuri V. Gulyaev, Prof. Victor V. Krylov, Dr. Victor P. Plessky (auth.)
ISBN-10: 3642577679
ISBN-13: 9783642577673
ISBN-10: 364263348X
ISBN-13: 9783642633485
Surface Acoustic Waves in Inhomogeneous Media covers just about all vital difficulties of the interplay of other different types of floor acoustic waves with floor inhomogeneities. the issues of floor acoustic wave interplay with periodic topographic gratings widespread in filters and resonators are lower than cautious attention. an important result of floor wave scattering by means of neighborhood defects resembling grooves, random roughness, elastic wedges are given. diverse theoretical techniques and functional ideas for fixing the outside wave difficulties are presented.
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Additional resources for Surface Acoustic Waves in Inhomogeneous Media
Sample text
In this case we have a negative potential difference between the layers in the depth of a semiconductor and the interface of this semiconductor and the substrate. The electrons are drifted by the sound into the depth of the semiconductor. 3) if there is no drift, then V~ > O. 31 (the attenuation constant a is proportional to w'). 4) where L is the sample length, d is its thickness (d » RD). 2-4) were derived under the assumption that though a semiconductor and a piezoelectric do not contact, there is no gap between them.
17]. If we consider the acoustoelectronic interaction of SAW in layered structures, the calculations become much more complicated, first of all, due to the complicated structure of Rayleigh waves in anisotropic materials. It becomes impossible to carry out the precise analytical analysis. 18] turned out to be very useful (for details, see Chap. 3). The Ingebrigtsen method is as follows: Let us consider the propagation of a surface wave along the boundary of a piezoelectric occupying the domain y < O.
10) was derived under the assumption that the film does not load the surface mechanically, and that its thickness is less than all the other characteristic dimensions (A, Rn). 10) shows that the AE-interaction is determined by the surface conductivity of the film O'd. We have the maximum amplification for the drift velocity equal to Vd - VR M = O'deo + 1. 6]. 11). 12, 21], see Fig. 2. Usually the conductivity in such films is not sufficiently small to support the continuous amplification. 21], acting as an acoustic waveguide, was used to improve the heat regime.
Surface Acoustic Waves in Inhomogeneous Media by Dr. Sergey V. Biryukov, Prof. Yuri V. Gulyaev, Prof. Victor V. Krylov, Dr. Victor P. Plessky (auth.)
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