Generalized Discrete Model of Systems with Distributed Feedback Based on Surface Acoustic Waves

We have developed a self-consistent physical model that improves the accuracy of calculating the characteristics of the devices based on both surface and pseudosurface acoustic waves. The model is free from restrictions inherent in the well-known method of coupled modes and other phenomenological me...

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Bibliographic Details
Published in:Radiophysics and quantum electronics 2016-11, Vol.59 (6), p.449-460
Main Authors: Sveshnikov, B. V., Bagdasaryan, A. S.
Format: Article
Language:English
Subjects:
Analysis
Anisotropy
Astronomy
Astrophysics and Astroparticles
Devices
Elastic anisotropy
Electric fields
Hadrons
Heavy Ions
Lasers
Mathematical and Computational Physics
Mathematical models
Nuclear Physics
Observations and Techniques
Optical Devices
Optics
Phase shift
Photonics
Physics
Physics and Astronomy
Propagation
Quantum Optics
Synchronism
Theoretical
Transducers
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Description
Summary:We have developed a self-consistent physical model that improves the accuracy of calculating the characteristics of the devices based on both surface and pseudosurface acoustic waves. The model is free from restrictions inherent in the well-known method of coupled modes and other phenomenological methods for studying distributed systems. The compact relationships describing all the characteristics of the acoustoelectric transducers of all types with allowance for the possible directionality of their radiation and its propagation loss are obtained using analytical solution of the difference equations. The method for determining the spatial orientation of the elastic-polarization ellipse in an anisotropic crystal, which allows one to unambiguously calculate the phase shift between the oscillations of two coupled dynamical subsystems, i.e., elastic displacements and the corresponding electric field, is proposed. The obtained results, which considerably facilitate the task of fast and accurate design of various devices on the basis of surface and pseudosurface acoustic waves, are valid in the general case for any frequency, including the harmonics of the frequency of the fundamental acoustic synchronism.
ISSN:0033-8443
1573-9120
DOI:10.1007/s11141-016-9713-7