Liu Zhifeng, Jin Guojun
National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China.
J Phys Condens Matter. 2009 Nov 4;21(44):445401. doi: 10.1088/0953-8984/21/44/445401. Epub 2009 Oct 15.
We study the resonant acoustic transmission through compound subwavelength periodic hole arrays. Fabry-Perot resonance peak splitting is found. We can attribute the phenomenon to phase resonances via calculating the phase difference between adjacent holes in a unit cell. Furthermore, by analyzing the transmission characteristics of different kinds of compound hole arrays for normal and non-normal incidence, it can be demonstrated that the phase resonances arise from the coupling between holes in a unit cell. In addition, we also discuss the transmission resonance originating from acoustic surface modes and illustrate the hybridized features of acoustic surface modes and Fabry-Perot modes. The results are expected to have advantages in tailoring resonant acoustic transmission properties.
我们研究了通过复合亚波长周期性孔阵列的共振声传输。发现了法布里 - 珀罗共振峰分裂现象。通过计算晶胞中相邻孔之间的相位差，我们可以将该现象归因于相位共振。此外，通过分析不同种类的复合孔阵列在正入射和非正入射情况下的传输特性，可以证明相位共振源于晶胞中孔之间的耦合。另外，我们还讨论了源自声表面模式的传输共振，并阐明了声表面模式和法布里 - 珀罗模式的混合特征。这些结果有望在定制共振声传输特性方面具有优势。
