Some features of absorption and photoluminescence of wulfenite (PbMoO4) crystals

Abstract

A description of experimental results of studying the optical absorption and photoluminescence (PL) of tetragonal (class 4/m ) PbMoO4 crystals is given. The light absorption (λ ≈ 0.30.5 μm) shows that the edge absorption is determined by phonon-assisted indirect transitions. Spectral characteristics of the absorption coefficient of crystals with two radiation polarizations in the temperature range from 77 to 300 K are investigated. The measured spectral dependence of the absorption coefficient at two orientation of polarization of light and the known theoretical dependence were combined and compared for determination the types of optical transitions in fundamental absorption of PbMoO4 crystals.