  Combining analysis from phonon signals and photon signals is a powerful
technique for reducing backgrounds in bolometer-based rare event searches.
Anti-reflective coatings can significantly increase the performance of the
secondary light-sensing bolometer in these experiments. As a first step toward
these improvements, coatings of SiO$_2$, HfO$_2$, and TiO$_2$ on Ge and Si
wafers were fabricated and characterized at room temperature and multiple
angles of incidence.
