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 publicationJournal articleAcademic researchpeer-review

81 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 languageEnglish
Article number193501
JournalApplied Physics Letters
Volume94
Issue number19
DOIs
Publication statusPublished - 18 Jun 2009

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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