Abstract

The propagation of electromagnetic pulses in a linear, dispersive Lorentz medium with two isolated resonance frequencies is presented within the context of the classical theory due to Sommerfeld and Brillouin. Particular attention is given to the modification of the dynamical field evolution when one proceeds from a single-resonance to a double-resonance medium. The appearance of a new field structure in the precursor field evolution is obtained, and the conditions for its evolution are described. The signal velocity for a pulsed field is obtained and compared with the energy-transport velocity in a double-resonance medium both when the conditions for the evolution of the modified precursor field structure are satisfied as well as when they are not satisfied and it is absent from the total propagated field structure.

© 1989 Optical Society of America

Uniform asymptotic description of electromagnetic pulse propagation in a linear dispersive medium with absorption (the Lorentz medium)

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Propagation of electromagnetic pulses in a linear dispersive medium with absorption (the Lorentz medium)

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Numerical determination of the signal velocity in dispersive pulse propagation

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Failure of the group-velocity description for ultrawideband pulse propagation in a causally dispersive, absorptive dielectric

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