Journal
JOURNAL OF APPLIED PHYSICS
Volume 107, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3361197
Keywords
photonic band gap; photonic crystals; thin wall structures
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Funding
- National Natural Science Foundation of China [10874131, 10731160613, 50702038, 10974147]
- Doctoral Research Foundation of Ministry of Education of China [20090141120073]
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We experimentally demonstrate the flexural shell modes of thin-walled hollow steel cylinders immersed in water. For a two-dimensional square-arranged phononic crystal consisting of such hollow cylinders, two flat bands are created because of the coupling of the shell modes among neighboring cylinders. The narrow bands associated with shell-modes are first validated by experiment. In particular, by analyzing the transmission spectra, band-structure, and eigen-pressure field distribution, we give detailed discussion on the anisotropic coupling behavior of the two flat bands with external incident plane waves.
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