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研究了一种新型的负载Er3+的二氧化硅介孔分子筛纳米材料,分析了其在有无功能化试剂全氟甲基磺酰(bis(perfluoromethylsulfonyl)amine)修饰作用下的吸收和荧光光谱特性,获得了高强度的荧光发射.应用Judd-Ofelt理论计算了强度参数(Ω2=1.88×10-20cm2,Ω4=5.45×10-20cm2,Ω6=3.11×10-20cm2)、跃迁振子强度、自发跃迁概率、能级辐射寿命等重要的光谱参数,讨论了吸收和发射跃迁截面(Ωem=10.9×10-21cm2),研究了在介孔分子筛纳米材料中的Er3+在不同的抽运功率条件下的荧光强度变化情况.比较了Er3+在不同基质材料中的带宽特性.研究表明二氧化硅介孔分子筛有利于实现高效率的激光输出或具有较宽带宽的高增益光放大,能够成为掺铒激光器或光放大器的新型基质材料.
A new type of silica supported mesoporous silica with Er3 + loading was investigated. The absorption and fluorescence spectra of the mesoporous silica nanomaterials with and without functionalization reagent bis (perfluoromethylsulfonyl) amine were studied. (Ω2 = 1.88 × 10-20cm2, Ω4 = 5.45 × 10-20cm2, Ω6 = 3.11 × 10-20cm2) were calculated using the Judd-Ofelt theory.The transition oscillator strength, the spontaneous transition probability , Energy level radiation life and other important spectral parameters. The absorption and emission transition cross sections (Ωem = 10.9 × 10-21cm2) were discussed. The fluorescence intensity of Er3 + in mesoporous molecular sieve nanomaterials under different pumping powers The comparison of the bandwidth characteristics of Er3 + in different matrix materials shows that the silica mesoporous molecular sieve is conducive to high efficiency laser output or high gain optical gain with wide bandwidth and can be used as erbium-doped laser or optical amplifier The new matrix material.