科研之友
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摘要
This study investigates the emission properties of the Er3+/Nd3+ ions codoped 70GeS(2)-10In(2)S(3)-20CsBr chalcohalide glasses. The vacuumed melt-quenching technique is employed to synthesize the glasses. The absorption spectra, upconversion and near-IR emission spectra as well as fluorescence decay curves are collected. With the increasing concentration of Er3+ ions, the lifetimes at 1073 nm for Nd3+ ions decrease from 538 to 420 mu s under 808 nm excitation. Meanwhile, the lifetimes at 1540 nm for Er3+ ions decrease from 245 to 214 mu s with the increasing concentration of Nd3+ ions. The emission spectra and lifetimes show that energy transfer exists between the Nd3+ and Er3+ ions. The luminescence and detailed energy transfer mechanisms are schematically proposed.
