Journal
ULTRASONICS
Volume 55, Issue -, Pages 42-47Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultras.2014.08.011
Keywords
Periodic piezoelectric and piezomagnetic composite; Phononic and photonic crystal; Phonon-polariton
Funding
- National Basic Research Program of China [2011CB610305]
- National Natural Science Foundation of China [11472149, 11072127]
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Coupled shear (SH) elastic and electromagnetic (EM) waves propagating oblique to a one dimensional periodic piezoelectric and piezomagnetic composite are investigated using the transfer matrix method. Closed-form expression of the dispersion relations is derived. We find that the band structures of the periodic composite show simultaneously the features of phononic and photonic crystals. Strong interaction between the elastic and EM waves near the center of the Brillouin zone (i.e., phonon-polariton) is revealed. It is shown the elastic branch of the band structures is more sensitive to the piezoelectric effect while the phonon-polariton is more sensitive to the piezomagnetic effect of the composite. (C) 2014 Elsevier B.V. All rights reserved.
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