Scattering Characteristics of the Chiral Slab for Normally Incident Transverse Waves

概要

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The elastic field behavior in a chiral medium is readily described using governing equations and constitutive relations for noncentrosymmetric, isotropic micropolar materials. Accordingly, two longitudinally, two left circularly and two right circularly polarized elastic waves can propagate in a chiral medium. Using appropriate field representations along with prescribed boundary conditions, scattering characteristics at chiral interfaces can be readily determined. In this paper, reflection and transmission characteristics of the chiral stab bounded by achiral media for normally incident transverse waves are thoroughly discussed. The method for approximately determining the vanishing reflection of the chiral slab over related frequency ranges is elucidated. Simulation results show that the scattering characteristics of the chiral stab can be designed by tailoring the material properties. These results can be used to design acoustic impedance transformers and acoustic absorbers.
社団法人応用物理学会の論文
1998-09-15