Chin. Phys. Lett.  2018, Vol. 35 Issue (5): 054601    DOI: 10.1088/0256-307X/35/5/054601
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
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Ze-Qun Fang, Zhi-Lin Hou 2018 Chin. Phys. Lett. 35 054601
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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.
Received: 21 December 2017      Published: 30 April 2018
PACS:  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)  
Fund: Supported by the National Natural Science Foundation of China under Grant No 11274121.
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Ze-Qun Fang
Zhi-Lin Hou
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