Point defect states of a hollow cylinder in two-dimensional phononic crystal

doi:10.1088/1674-1056/21/6/064301

Abstract Point defect states in two-dimensional phononic crystal of a hollow mercury cylinder in a water host are studied. An improved plane expansion method combined with the supercell technique is used to calculate the band gaps and the pressure distribution at the defect position. The sonic pressure of defect modes shows that the waves are localized at or near the defect. As the filing fraction increases, more defect modes appear in the band gaps.

Keywords: phononic crystal point defect cavity defect hollow cylinder

Received: 27 September 2011
Revised: 24 October 2011
Accepted manuscript online:

PACS:	43.20.+g	(General linear acoustics)
	61.72.J-	(Point defects and defect clusters)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10864009), the Natural Science Foundation of Yunnan Province, China (Grant No. 2008CD109), and the State Key Program of the National Natural Science of China (Grant No. 50734007).

Corresponding Authors: Yang Hai
E-mail: kmyangh@263.net

Cite this article:

Gao Xiao-Wei(高晓薇), Chen Shi-Bo(陈世波), Chen Jian-Bing(陈建兵), Zheng Qin-Hong(郑勤红), and Yang Hai(杨海) Point defect states of a hollow cylinder in two-dimensional phononic crystal 2012 Chin. Phys. B 21 064301

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