Phononic-Crystal Acoustic Lens by Design for Energy-Transmission Devices

被引：14
作者：
Kanno, Yusuke [1 ]
Tsuruta, Kenji [1 ]
Fujimori, Kazuhiro [1 ]
Fukano, Hideki [2 ]
Nogi, Shigeji [1 ]
机构：
[1] Okayama Univ, Okayama 7008530, Japan
[2] Okayama Univ, Grad Sch Nat Sci & Technol, Okayama 7008530, Japan
来源：
ELECTRONICS AND COMMUNICATIONS IN JAPAN | 2014年 / 97卷 / 01期
关键词：
phononic crystal; acoustic lens; energy transmission; FDTD simulation; NEGATIVE REFRACTION; WAVES;
D O I：
10.1002/ecj.11491
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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. (c) 2013 Wiley Periodicals, Inc. Electron Comm Jpn, 97(1): 22-27, 2014; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.11491
引用
收藏
页码：22 / 27
页数：6
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