PRECURSOR PROPAGATION IN DISPERSIVE MEDIA FROM SHORT-RISE-TIME PULSESAT OBLIQUE-INCIDENCE

The derivation and the application of a numerical method designed to s tudy the propagation of pulsed electromagnetic fields into dispersive dielectric materials are reported. A Fourier series based methodology, appropriate for a useful class of pulse train incident signals, is pr esented and utilized to study the dynamics of dispersive pulse propaga tion in a half-space constructed of a Debye or a Lorentz model medium. Computed solutions are presented showing precursor propagation excite d by pulses obliquely incident upon a planar boundary to the medium. T he results show that oblique incident pulses upon a Lorentz medium can excite different types of precursor, propagating in unique directions within the half-space.