Tunable Band Gap in Piezoelectric Composite Rod Based on the Inter-Coupling Effect
Ze-Qun Fang, Zhi-Lin Hou**
School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510641
Abstract ：The longitudinal wave propagating in one-dimensional periodic piezoelectric composite rod with inter-coupling between different piezoelectric segments is investigated. The analytical formulae for such a structure are shown and the dispersion relation is calculated. The results show that, by introducing the inter-coupling between the different piezoelectric segments, which is accomplished by serially connecting every $n$ piezoelectric segment into supercells, some tunable Bragg band gaps can accordingly be opened in the low frequency region. The investigation could provide a new guideline for the tunable phononic crystal under passive control.
收稿日期: 2017-12-21
出版日期: 2018-04-30
:
46.40.-f
(Vibrations and mechanical waves)
77.65.-j
(Piezoelectricity and electromechanical effects)
62.25.Jk
(Mechanical modes of vibration)
63.22.-m
(Phonons or vibrational states in low-dimensional structures and nanoscale materials)
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2018, Vol. 35 
