We have demonstrated that an efficient energy transfer takes place from Yb3+ to Cr4+ in calcium aluminate glasses. Yb3+ improves excitation efficiency at around 980 nm, enhancing emission intensity of Cr4+ fluorescence at 1.2–1.6 μm. Nonradiative energy transfer via electric dipole–dipole interaction between ytterbium and chromium ions was found to be dominant over radiative Yb3+ → Cr4+ energy transfer
我们已经证明在铝酸
钙玻璃中从 Yb3+ 到 Cr4+ 发生了有效的能量转移。Yb3+ 提高了 980 nm 附近的激发效率,增强了 Cr4+ 荧光在 1.2-1.6 μm 的发射强度。发现通过
镱和
铬离子之间的电偶极-偶极相互作用的非辐射能量转移优于辐射 Yb3+ → Cr4+ 能量转移。扩散受限的能量转移机制很好地解释了 Yb3+/Cr4+- 共掺杂
玻璃的衰减行为。这种共掺杂方案可能适用于其他含 Cr4+ 的晶体和
玻璃。