Abstract
Three kinds of the periodical structures are designed as low-pass, high-pass, and band-pass filters for elastic wave. The theoretical simulations have proved that the periodical surface slots can act as a low-pass filter for elastic wave. With increasing depth of the surface periodical structure in the sample, the cutoff frequency of the low-pass filter is decreased. Unlike the surface periodical structure, the periodical subsurface structure can work as a high-pass filter for elastic wave. The cutoff frequency of the high-pass filter is suppressed by the increase of the subsurface structure thickness. When the two periodical structures are combined together, the band-pass filter is obtained, in which the pass band is determined by the cutoff frequencies of the low-pass and high-pass filters.
Published Version
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