Anisotropic Reflectivity of Ag₂F Crystal

Abstract

Anisotropic reflectivity spectra of an Ag₂F crystal have been investigated for linearly polarized light with the electric vectors both parallel and perpendicular to the c-axis. Steep rises of the Drude-type reflectivity are found at 2.7 and 0.9 eV for E⊥c and E⁄⁄c spectra, respectively, and are interpreted as being due to the anisotropy in plasma frequency of electrons in the conduction band. In the spectrum for E⊥c, an extremely sharp dip of the reflectivity is observed at 2.9 eV which is similar to the absorption window of silver metal.