Giant enhancement of phonon-assisted one-photon excited frequency upconversion in a Nd3+-doped tellurite glass
Giant enhancement of phonon-assisted one-photon excited frequency upconversion in a Nd3+-doped tellurite glass
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DOI：
10.1063/1.4789965
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发表时间：
2013-02
影响因子：
3.2
通讯作者：
M. S. Marques;L. Menezes;L. Kassab;C. Araújo
中科院分区：
文献类型：
--
作者：
M. S. Marques;L. Menezes;L. Kassab;C. Araújo
当样品温度从200 K变化到535 K时，在805 nm的5 ns激光脉冲激发下，观察到Nd ~（3+）掺杂碲酸盐玻璃在~ 754 nm处的声子辅助上转换发光增强了670倍。一个速率方程模型，包括相关的能级和温度依赖的过渡率，提出了描述的过程。当考虑到754 nm发光的非辐射跃迁是由能量为700 cm−1的有效声子模促进时，结果与数据吻合得很好。
Changing the sample's temperature from 200 K to 535 K, we observed 670-fold enhancement of a phonon-assisted upconversion emission at ≈754 nm obtained from a Nd3+-doped tellurite glass excited by 5 ns laser pulses at 805 nm. A rate-equation model, including the relevant energy levels and temperature dependent transition rates, is proposed to describe the process. The results fit well with the data when one considers the nonradiative transitions contributing for the 754 nm luminescence are promoted by an effective phonon mode with energy of 700 cm−1.