A magnified lamb wave source based on the resonant cavity of phononic-crystal plates

Jia Hong Sun*, Tsung Tsong Wu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


In this paper, we analyzed Lamb wave generation based on the resonant cavity of a phononic-crystal plate. The phononic-crystal plate is composed of circular steel cylinders which form a square lattice in an epoxy plate and the resonant cavity is created by arranging defect inside the periodic structure. The dispersion and eigenmodes of acoustic waves are analyzed by the finite-difference time-domain method. By exciting the specific resonant mode in an asymmetric cavity, the enlarged displacement field is observed which propagates away from the cavity. The asymmetric cavity shows a directional propagation and the magnified ratio of Lamb wave can be two-order larger than the normal one.

Original languageEnglish
Title of host publication2007 IEEE Ultrasonics Symposium Proceedings, IUS
Number of pages4
StatePublished - 2007
Externally publishedYes
Event2007 IEEE Ultrasonics Symposium, IUS - New York, NY, United States
Duration: 28 10 200731 10 2007

Publication series

NameProceedings - IEEE Ultrasonics Symposium
ISSN (Print)1051-0117


Conference2007 IEEE Ultrasonics Symposium, IUS
Country/TerritoryUnited States
CityNew York, NY


  • Finite-difference time-domain method
  • Lamb wave
  • Phononic-crystal plate
  • Resonant cavity


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