Anomalous Doppler effects in bulk phononic crystal
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- 作者：Feiyan Cai ; Zhaojian He ; Anqi Zhang ; Yiqun Ding ; Zhengyou Liu
- 关键词：Doppler shift ; Phononic band gap ; Green's function method
- 刊名：Physics Letters A
- 出版年：2010
- 出版时间：23 August 2010
- 年：2010
- 卷：374
- 期：38
- 页码：3971-3976
- 全文大小：931 K
文摘
Doppler effects in simple cubic phononic crystal are studied theoretically and numerically. In addition to observing Doppler shifts from a moving source's frequencies inside the gap, we find that Doppler shifts can be multi-order, anisotropic, and the dominant order of shift depends on the band index that the source's frequency is in.