// In this article, we extend our previous work to study on how the interaction of the matter-wave with the grating surface of a finite width affects the half-plane array diffraction. In reality, the atom-surface interaction is not negligible and their influence extended as the strip widths become longer. The interaction induces an additional phase shift along the path of the matter-wave, and, therefore, reduces the diffraction efficiency. //Oberst and his coworkers ~~ .// The interaction effects appear differently for different species such as He and D2, for different periods of gratings with the same strip width, and for different de Broglie wavelengths of He atoms. Moreover, we look into the possibility to apply this model to general gas by caring on a theoretical investigation into reflectivity of nitrogen and helium dimer from the half-plane system. ~~//
This report is structured as follows: