Surface acoustic waves in pillars-based two-dimensional phononic structures with different lattice symmetries

Abdelkrim Khelif; Younes Achaoui; Boujemaa Aoubiza

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Surface acoustic waves in pillars-based two-dimensional phononic structures with different lattice symmetries

机译：具有不同晶格对称性的基于柱的二维声子结构中的表面声波

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The theoretical study deals with the propagation of surface acoustic waves in two-dimensional arrays of resonant elements with different symmetry lattices. The resonant elements are cylindrical pillars on the surface of a semi-infinite substrate. The obtained band structures show the interaction of the pillars acoustic resonances with the semi-infinite medium which form additional band gaps that are decoupled from Bragg gaps. Especially, the frequency position of the lowest band gap is invariant with respect to lattice symmetries. Thereby, this position is independent of the lattice pitch, which is unexpected in band gaps based on Bragg interferences. However, the role of the period remains important for defining the non-radiative region limited by the slowest bulk mode and influencing the existence of the guided modes. Numerical simulations are based on the efficient finite element method and considered silicon pillars on a silicon substrate.

机译：理论研究涉及表面声波在具有不同对称晶格的谐振元件的二维阵列中的传播。谐振元件是半无限基片表面上的圆柱形支柱。所获得的能带结构显示了柱声共振与半无限介质的相互作用，该半无限介质形成了与布拉格能隙解耦的附加能隙。特别地，最低带隙的频率位置相对于晶格对称性是不变的。因此，该位置与晶格间距无关，这在基于布拉格干扰的带隙中是出乎意料的。但是，对于定义受最慢体模限制的非辐射区域并影响引导模的存在，周期的作用仍然很重要。数值模拟基于有效的有限元方法，并考虑了硅基板上的硅柱。

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《Journal of Applied Physics》 |2012年第3期|p.033511.1-033511.4|共4页
作者
Abdelkrim Khelif; Younes Achaoui; Boujemaa Aoubiza;
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作者单位

Institut FEMTO-ST, Universite de Franche-Comte, CNRS, 32 Avenue de I' Observatoire 25044 Besangon Cedex, France;

Institut FEMTO-ST, Universite de Franche-Comte, CNRS, 32 Avenue de I' Observatoire 25044 Besangon Cedex, France;

Laboratoire de Mathematiques, Universite de Franche-Comte, Route de Gray, 25030 Besangon Cedex, France;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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正文语种 eng
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1. Band structure of acoustic waves in phononic lattices: Two-dimensional composites with large acoustic mismatch [J] . Tanaka Y., Tamura S., Tomoyasu Y. Physical Review, B. Condensed Matter . 2000,第11期

机译：声子晶格中声波的能带结构：具有较大声失配的二维复合材料
2. In-plane confinement and waveguiding of surface acoustic waves through line defects in pillars-based phononic crystal [J] . Abdelkrim Khelif, Younes Achaoui, Boujemaa Aoubiza AIP Advances . 2011,第4期

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3. Band structures of acoustic waves in phononic lattices [J] . Tanaka Y., Tamura S. Physica, B. Condensed Matter . 2002,第0期

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4. Tunable Phononic Band Gaps of Surface and Bulk Acoustic Waves in Two-dimensional Phononic Crystals [C] . Tsung-Tsong Wu, Zi-Gui Huang IEEE Ultrasonics Symposium . 2005

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5. Brillouin studies of surface acoustic waves in nanostructured phononic crystals [D] . Chenguang, Hou. 2015

机译：纳米结构声子晶体中表面声波的布里渊研究
6. Probing Thermomechanics at the Nanoscale: Impulsively Excited Pseudosurface Acoustic Waves in Hypersonic Phononic Crystals [O] . Damiano Nardi, Marco Travagliati, Mark E. Siemens, -1

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7. Band structure of acoustic waves in phononic lattices: Two-dimensional composites with large acoustic mismatch [O] . Tanaka, Yukihiro, Tomoyasu, Yoshinobu, Tamura, Shin-ichiro 2000

机译：声子晶格中声波的能带结构：具有较大声失配的二维复合材料

Surface acoustic waves in pillars-based two-dimensional phononic structures with different lattice symmetries

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