Time-dependent Bragg diffraction and short-pulse reflection by one-dimensional photonic crystals
Résumé
The time-‐dependence of the Bragg diffraction by one-‐dimensional photonic crystals and its influence on the short pulse reflection are studied in the framework of the coupled-‐ wave theory. The indicial response of the photonic crystal is calculated and it appears that it presents a time-‐delay effect with a transient time conditioned by the extinction length. A numerical simulation is presented for a Bragg mirror in the x-‐ray domain and a pulse envelope modelled by a sine-‐squared shape. The potential consequences of the time-‐delay effect in time-‐dependent optics of short-‐pulses are emphasized .
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