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

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

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The lens effect of acoustic waves in a 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. The lens effect is observed for the far-field wave in 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)22-27
Number of pages6
JournalElectronics and Communications in Japan
Volume97
Issue number1
DOIs
Publication statusPublished - Jan 1 2014

Keywords

  • FDTD simulation
  • acoustic lens
  • energy transmission
  • phononic crystal

ASJC Scopus subject areas

  • Signal Processing
  • Physics and Astronomy(all)
  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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