Pulsed THZ Interrogation of Sofi With Knit Lines in 2D

Abstract

ABSTRACT. This paper examines the scattering effect of knit lines and voids in SOFI through simulations of THz interrogation at normal and non-normal angles of incidence and using focused and non-focused single-cycle plane waves. We model the electromagnetic field using the TE mode of the 2D Maxwell's equations reduced to a wave equation, which are then solved with a finite-element time-domain method. The knit lines are modeled by changing the dielectric constant.