Utah State University
Diffraction patterns can be made either by transmitting or reflecting light from a grating which is an array of parallel lines (rulings) with a fixed periodicity. Elementary optical treatment of diffraction gratings only describes diffraction angles as a function of periodicity of the grating. However, we have observed that the profile and materials of the grating do affect the diffraction pattern. In this study, I investigated the correlation between the grating profiles obtained by scanning electron microscopy and the materials of the grating (polymer and silicon dioxide) and the spectra as a function of the diffraction angle. An optical spectrometer made to measure the angle of incident and reflection as well as an energy spectrometer were used to collect the data.
Halling, Brock, "The Effects of Materials and Profiles of Gratings on Diffraction Spectra" (2021). Physics Capstone Projects. Paper 95.