Thermal tuning of phononic bandstructure in ferroelectric ceramic/epoxy phononic crystal

K. L. Jim; Chi Wah Leung; S. T. Lau; S. H. Choy; H. L.W. Chan

doi:10.1063/1.3136752

Thermal tuning of phononic bandstructure in ferroelectric ceramic/epoxy phononic crystal

K. L. Jim, Chi Wah Leung, S. T. Lau, S. H. Choy, H. L.W. Chan

Research output: Journal article publication › Journal article › Academic research › peer-review

109 Citations (Scopus)

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) TiO3/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.

Original language	English
Article number	193501
Journal	Applied Physics Letters
Volume	94
Issue number	19
DOIs	https://doi.org/10.1063/1.3136752
Publication status	Published - 18 Jun 2009

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3136752

http://hdl.handle.net/10397/23581

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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) TiO3/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.",

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AB - 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) TiO3/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.

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Thermal tuning of phononic bandstructure in ferroelectric ceramic/epoxy phononic crystal

Abstract

ASJC Scopus subject areas

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