Near-infrared down-conversion in Mn2+–Yb3+ co-doped Zn2GeO4
Abstract
We report on near-infrared (NIR) down-conversion by energy transfer between Mn2+ and Yb3+ in crystalline Zn1.96−xGeO4+1/2x:Mn0.04Ybx. In the Zn2GeO4 lattice, intrinsic defect transitions and Mn2+ ions act as broadband spectral sensitizers by absorbing