Surface corrugated laminates as elastic grating couplers: Splitting of SV- and P-waves by selective diffraction

The phenomenon of selective diffraction is extended to in-plane elastic waves and we design surface corrugated periodic laminates that incorporate crystal momentum transfer which, due the rich physics embedded within vector system, results in frequency, angle wave-type diffraction. resulting devices are grating couplers, with additional capabilities as compared analogous scalar electromagnetic couplers possess ability split independently redirect, through negative refraction, two body present system: compressional (P) shear-vertical (SV) waves. paradigm, interpretation, aided by obtaining isofrequency contours via a non-dimensionalised matrix method.