Journal
MATERIALS TODAY
Volume 12, Issue 12, Pages 34-42Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S1369-7021(09)70315-3
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Funding
- National Basic Research Program of China [2007CB 613202]
- National Nature Science Foundation of China [50632030]
- Changjiang Scholars and Innovative Research Team in University (PCSIRT)
- Nature Science Foundation of Jiangsu Province [BK2007712]
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Phononic crystals have been proposed about two decades ago and some important characteristics such as acoustic band structure and negative refraction have stimulated fundamental and practical studies in acoustic materials and devices since then. To carefully engineer a phononic crystal in an acoustic atom scale, acoustic metamaterials with their inherent deep subwavelength nature have triggered more exciting investigations on negative bulk modulus and/or negative mass density. Acoustic surface evanescent waves have also been recognized to play key roles to reach acoustic subwavelength imaging and enhanced transmission.
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