Lee Hyuk, Oh Joo Hwan, Kim Yoon Young
WCU Multiscale Design Division, School of Mechanical and Aerospace Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-744, Republic of Korea.
WCU Multiscale Design Division, School of Mechanical and Aerospace Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-744, Republic of Korea.
Ultrasonics. 2015 Feb;56:178-82. doi: 10.1016/j.ultras.2014.10.012. Epub 2014 Oct 20.
This work presents an experimental evidence for triple beam splitting in an elastic plate with an embedded elastic phononic crystal (PC) prism and elaborates on its working mechanism. While there were reports on negative refraction and double beam splitting with PCs, no experimental evidence on the splitting of triple or more ultrasonic elastic beams through PCs has been shown yet. After the experimental results are presented in case of triple beam splitting, further analysis is carried out to explain how triple or more beams can be split depending on elastic PC prism angles.
这项工作展示了在嵌入弹性声子晶体（PC）棱镜的弹性板中实现三束光分裂的实验证据，并阐述了其工作机制。虽然已有关于PCs的负折射和双光束分裂的报道，但尚未有关于通过PCs分裂三束或更多超声弹性光束的实验证据。在给出三束光分裂情况下的实验结果后，进一步进行分析以解释根据弹性PC棱镜角度如何分裂三束或更多光束。
