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Peculiar transmission property of acoustic waves in a one-dimensional layered phononic crystal |
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| Authors: | Degang Zhao Wengang Wang Zhengyou Liu Jing Shi Weijia Wen |
| Institution: | aKey Lab of Acoustic and Photonic Materials and Devices of Ministry of Education and Department of Physics, Wuhan University, Wuhan 430072, China bDepartment of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China |
| Abstract: | In this article, we report both theoretical calculation and experimental observation of acoustic waves abnormally through a one-dimensional layered transmitted phononic crystal at frequencies within the band gap into a material of large acoustic impedance mismatch, with an efficiency as high as unity. The transmission peaks can be interpreted as a result of the interference of acoustic waves reflected from all periodically aligned interfaces. The condition for the appearance of peaks is analyzed in detail and the optimized layer number is given for different configurations. |
| Keywords: | Phononic crystal Acoustic waves Peculiar transmission |
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