THE BEHAVIOR OF ELECTROMAGNETIC LOCALIZED WAVES AT A PLANAR INTERFACE

In this paper, we investigate the behavior of electromagnetic localize d waves [LW's], which are concentrated moving pulses of energy, at an interface between two electrically different media, We employ a previo usly, given Fourier transform domain representation of LW's that is ge ometric in nature; the Fourier transform of an LW consists of a suppor t line on a particular surface together with a weighting associated wi th this line, The behavior of electromagnetic LW's at an interface is somewhat involved owing to their broadband nature, but this behavior h as a lucid pictorial representation in terms of the transform domain g eometry and, in this paper, we exploit this representation, If an LW s trikes the interface obliquely then a different LW is reflected, but t he pulse transmitted into the second medium is not a LW. We give analy tical and graphical evidence of this behavior, Moreover, we show that if one desires a particular LW to be propagated into the second medium , one can in some cases design the necessary non-LW pulse one needs to launch at the interface to achieve this goal.