Thermal tuning of phononic bandstructure in ferroelectric ceramic/epoxy phononic crystal
- 11 May 2009
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 94 (19), 193501
- https://doi.org/10.1063/1.3136752
Abstract
Thermal tuning of phononic bandgaps in megahertz range was demonstrated in ferroelectric ceramic-based phononic crystal structure. Temperature variation across ferroelectric phase transition, accompanied by substantial changes in acoustic velocities, leads to a shift in the phononic bandstructure of a two-dimensional ( Ba , Sr ) TiO 3 / epoxy composite sample over a range of 10 ° C . Experimental results are supported by modelings based on plane-wave expansion calculations. The high tunability of phononic bandstructure is advantageous for active control of ultrasound transmissions.Keywords
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