Wave propagation through a piezoelectric semiconductor slab sandwiched by two piezoelectric half-spaces. (English) Zbl 1472.74119
Summary: The paper analyses the wave propagation through a piezoelectric semiconductor slab sandwiched by two piezoelectric half-spaces. The two piezoelectric half-spaces (left and right) are both AlN materials, the middle piezoelectric semiconductor slab is ZnO material and is assumed to be transversely isotropic. The semiconductor effect is emphasized by considering the coupling mechanical displacement, electric potential and the carrier in the slab. The state transition differential equation is derived based on the reduction of order of the governing equations and the transfer matrix of state is obtained by solving the state transition equation. The present method can deal with not only the homogeneous slab but also the heterogeneous slab. Two cases (incident QP wave and incident QSV wave) are considered, and the energy reflection and transmission coefficients varying with the incident angle are calculated. The results show that the steady carrier density and the exterior biasing electric field have obvious influences on the reflection and transmission coefficients. This investigation provides a new thought for the adjustment and controlling of elastic wave propagation in the laminated structures.
MSC:
| 74J20 | Wave scattering in solid mechanics |
| 74F15 | Electromagnetic effects in solid mechanics |
| 74E30 | Composite and mixture properties |
Keywords:
transvesely isotropic semiconductor; electric potential; reflection coefficient; transmission coefficient; transfer matrixReferences:
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