Numerical Investigation of the Enhanced Propagation for Electromagnetic Nondestructive Testing by Metasurface-based Impedance Matching

In this paper, we present our numerical investigation results of the enhanced electromagnetic propagation when an antireflective metasurface superstrate is placed atop of the material under test for non-destructive testing applications. The simple metasurface design can effectively manipulate the transmission/reflection coefficients of the incident EM waves. The resultant enhanced propagation is numerically demonstrated for various MUT's properties, which provides a strong evidence for practical NDT applications.