Analyses of acoustic band gaps in phononic crystals using PWE and FDTD methods

Tsung Tsong Wu*, Jia Hong Sun, Zi Gui Huang

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

Abstract

In this paper, we present analyses of band gaps in phononic crystals. The plane wave expansion (PWE) and finite difference time domain (FDTD) method are introduced and adopted to analyze the band gaps of tungsten/silicon phononic crystals. The dispersion relation shows acoustic band gap (ABG) in hundred MHz range for the micrometer scale phononic crystal. In this phononic crystal, the acoustic band gap variation due to the filling fraction and temperature is presented. In addition, the transmission is also adopted to analyze the band gap and more details are revealed by demonstrating the displacement field.

Original languageEnglish
Pages (from-to)139-146
Number of pages8
JournalJournal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao
Volume26
Issue number1-2
StatePublished - 04 2005
Externally publishedYes

Keywords

  • Acoustic band gap
  • Finite difference time domain
  • Phononic crystal
  • Plane wave expansion

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