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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Propagation of longitudinal leaky surface waves under periodic SiO2/Al structure on Li2B4O7substrate
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Propagation of longitudinal leaky surface waves under periodic SiO2/Al structure on Li2B4O7substrate

机译：周期性SiO2 / Al结构在Li2B4O7衬底上传播纵向泄漏表面波

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摘要

The properties of longitudinal leaky surface waves (LLSW) under anperiodic SiO2/Al structure on Li2B4On7 (LBO) substrate, were investigated theoretically andnexperimentally, in order to improve the high propagation losses of LLSWsnunder a periodic Al grating with the normalized thickness over 2%. Innthe theoretical analysis, the previously presented method based on thenboundary integral equations for the periodic metal grating structure onnthe substrate was extended to include the dielectric layer. In thenexperiments, devices with Al electrodes recessed into a SiO2ngroove on LBO were fabricated, and the propagation losses of them werenestimated. As a result, it was shown that, when the surface of thenstructure was flattened, the propagation losses were sufficiently lownand the first Bragg stopband width decreased
机译：从理论上和实验上研究了Li2B4On7（LBO）衬底在非周期性SiO2 / Al结构下的纵向泄漏表面波（LLSW）的特性，以改善归一化厚度超过2％的周期性Al光栅下LLSWsn的高传播损耗。通过理论分析，将先前提出的基于边界积分方程的基底上周期性金属光栅结构的方法扩展到包括介电层。在随后的实验中，制造了具有在LBO上凹入SiO2沟槽的Al电极的器件，并确定了它们的传播损耗。结果表明，当扁平结构的表面变平时，传播损耗足够低，并且第一布拉格阻带宽度减小

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