On the passage of an extremely short electromagnetic pulse through a ferroelectric layer embedded in a paraelectric

Abstract

The refraction and reflection of an extremely short pulse of electromagnetic radiation on a layer of a ferroelectric are considered. For an incident pulse, a stationary pulse propagating without distortions in a paraelectric was used. It is shown that low-amplitude pulses undergo a strong reflection at the entrance to a ferroelectric medium and are not recovered after passage through the layer. High-amplitude pulses are reflected to a considerably lesser extent and can turn into a new stationary pulse after passage through the layer of a ferroelectric. The refraction is accompanied by excitation of polarization oscillations localized at the boundaries of the layer. The intensity of these oscillations and the fraction of the reflected wave are significantly different in cases of similar or opposite polarities of the ferroelectric and incident pulse.