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

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

doi:10.1002/ecj.11491

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

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

Research output: Contribution to journal › Article › peer-review

9 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 language	English
Pages (from-to)	22-27
Number of pages	6
Journal	Electronics and Communications in Japan
Volume	97
Issue number	1
DOIs	https://doi.org/10.1002/ecj.11491
Publication status	Published - Jan 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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10.1002/ecj.11491

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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.",

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AU - Kanno, Yusuke

AU - Tsuruta, Kenji

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AU - Fukano, Hideki

AU - Nogi, Shigeji

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AB - 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.

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