This paper was presented in 8th International Symposium on NDT in Aerospace, November 3-5, 2016
Abstract: In this paper, we demonstrate the application of a holey structured metamaterial lens for sub-wavelength imaging
of defects in a laminated metallic sample in the ultrasonic regime. Finite Element (FE) simulations are used to
study longitudinal wave interaction with ideal delaminations in isotropic elastic materials. Holey-structured
metamaterial lens is then used to transmit the scattered wave field. This paper discusses the subwavelength
resolution of λ/7 delamination in a laminated aluminium sample which to the best of our knowledge this is the
highest resolution achieved in the ultrasonic regime.