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Anomalous incident-angle and elliptical-polarization rotation of an elastically refracted P-wave

We report a newly discovered anomalous incident-angle of an elastically refracted P-wave, arising from a P-wave impinging on an interface between two VTI media with strong anisotropy. This anomalous incident-angle is found to be located in the post-critical incident-angle region corresponding to a r...

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Detalles Bibliográficos
Autores principales: Fa, Lin, Fa, Yuxiao, Zhang, Yandong, Ding, Pengfei, Gong, Jiamin, Li, Guohui, Li, Lijun, Tang, Shaojie, Zhao, Meishan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4525486/
https://www.ncbi.nlm.nih.gov/pubmed/26244284
http://dx.doi.org/10.1038/srep12700
Descripción
Sumario:We report a newly discovered anomalous incident-angle of an elastically refracted P-wave, arising from a P-wave impinging on an interface between two VTI media with strong anisotropy. This anomalous incident-angle is found to be located in the post-critical incident-angle region corresponding to a refracted P-wave. Invoking Snell’s law for a refracted P-wave provides two distinctive solutions before and after the anomalous incident-angle. For an inhomogeneously refracted and elliptically polarized P-wave at the anomalous incident-angle, its rotational direction experiences an acute variation, from left-hand elliptical to right-hand elliptical polarization. The new findings provide us an enhanced understanding of acoustical-wave scattering and lead potentially to widespread and novel applications.