Phononic-crystal acoustic lens by design for energy-transmission devices

Yusuke Kanno, Kenji Tsuruta, Kazuhiro Fujimori, Hideki Fukano, Shigeji Nogi

Research output: Contribution to journalArticlepeer-review


Lens effect of acoustic wave in two-dimensional (2D) phononic crystal is studied by numerical simulation based on the finite-difference time-domain (FDTD) method. We calculate the phonon band structure of 2D phononic crystals, consisting of metal/ceramic cylinders placed periodically in water. Lens effect is observed for far-field wave in the phononic crystals with two-layered and graded-index structure. We compare the focal intensity and the energy transmission efficiency in these numerical experiments, and show that a novel energy-transmission device can be designed using phononic crystals.

Original languageEnglish
Pages (from-to)686-690
Number of pages5
JournalIEEJ Transactions on Electronics, Information and Systems
Issue number5
Publication statusPublished - 2012


  • Acoustic lens
  • Energy transmission
  • FDTD simulation
  • Phononic crystal

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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