Differentiating space–time optical signals using resonant nanophotonics structures

A theoretical description of the space–time transformations of an optical signal, which passes through resonant gratings and Bragg gratings with a defect, is proposed. The problem of differentiating a space–time optical signal using a resonant grating has been solved. The strict solution to the Maxwell equations using the Fourier modal method is involved to determine the parameters of the transfer function of the resonant diffraction structure and to carry out numerical modeling, which has confirmed the proposed theoretical description.