Spectral Green`s function for wave excitation and propagation in a piezoelectric, continuously twisted, structurally chiral medium
Journal Article
·
· Journal of the Acoustical Society of America
- CATMAS-Computational and Theoretical Materials Sciences Group, Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania 16802-1401 (United States)
- Alberta Microelectronic Centre and Department of Electrical Engineering, University of Alberta, Edmonton, Alberta T6G 2G7 (Canada)
A continuously twisted, structurally chiral medium (CTSCM) is a reciprocal medium whose constitutive properties vary helicoidally along its axis of spirality (say, the z axis), and the corresponding piezoelectric medium is abbreviatedly called the PCTSCM. Very recent progress in thin-film research is presented here to show that technologically significant CTSCM`s and PCTSCM`s are waiting in the wings and calling for theoretical advances in the understanding of wave excitation and propagation in these novel materials. A spectral Green`s function is obtained as a bilinear composition of two matrices, after implementing a spatial Fourier transform in the xy plane as well as the Oseen transformation. As a result, multilayered media problems as well as grating problems utilizing CTSCM`s and PCTSCM`s become accessible to theoretical exploration leading to novel transducers, sensors, and other devices. {copyright} {ital 1997 Acoustical Society of America.}
- OSTI ID:
- 491846
- Journal Information:
- Journal of the Acoustical Society of America, Journal Name: Journal of the Acoustical Society of America Journal Issue: 4 Vol. 101; ISSN 0001-4966; ISSN JASMAN
- Country of Publication:
- United States
- Language:
- English
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