Feynman-Dlagram Approach to Wave Diffraction by Media Having Multiple Periodicities
Problems requiring the accurate determination of waves diffracted by periodically modulated media have been treated most recently by using coupled-wave techniques. By developing a field representation in terms of multiply scattered waves, we provide here an alternative approach which is particularly effective for situations involving two or more superposed volume gratings. An advantage of this approach is that the diffracted fields can be described by modified Feynman diagrams in the form of flow charts. These diagrams provide a phenomenological description of the scattering process, and they also serve as a powerful and systematic tool for the rapid evaluation of any diffracted grating orders.
Unable to display preview. Download preview PDF.