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Band Gap and Waveguide States in Two-Dimensional Disorder Phononic Crystals |
| LI Xiao-Chun1,2;LIU Zheng-You1;LIANG Hong-Yu2;XIAO Qing-Wu2 |
| 1Department of Physics, Wuhan University, Wuhan 430072
2Department of Physics, Central South University, Changsha 410073 |
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| Cite this article: |
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LI Xiao-Chun, LIU Zheng-You, LIANG Hong-Yu et al 2006 Chin. Phys. Lett. 23 1830-1833 |
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Abstract The influences of the configurational disorders on phononic band gaps and on waveguide modes are investigated for the two-dimensional phononic crystals consisting of water cylinders periodically arrayed in mercury. Two types of configurational disorders, relevant to the cylinder position and cylinder size respectively, are taken into account. It is found that the phononic band gap and the guide band are sensitive to the disorders, and generally become narrower with the increasing disorders. It is also found that the waveguide side walls without disorder can significantly prevent the guide modes in the waveguide from influence by the disorders in the crystals to a large amount.
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| Keywords:
43.20.+g
43.35.+d
43.40.+s
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Published: 01 July 2006
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| PACS: |
43.20.+g
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(General linear acoustics)
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43.35.+d
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(Ultrasonics, quantum acoustics, and physical effects of sound)
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43.40.+s
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(Structural acoustics and vibration)
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