Broadband flat near-infrared emission from tellurite glass doped with Tm3+, Er3+ and Ag NPs
Broadband flat near-infrared emission from tellurite glass doped with Tm3+, Er3+ and Ag NPs
复制标题
掺杂 Tm3 、 Er3 和 Ag NP 的亚碲酸盐玻璃的宽带平坦近红外发射
DOI：
10.1016/j.optlastec.2020.106264
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发表时间：
2020
影响因子：
5
通讯作者：
Zhou Yaxun
中科院分区：
文献类型：
--
作者：
Shen Xinjie;Zhang Yu;Xia Lizhang;Li Jun;Yang Gaobo;Zhou Yaxun
采用一步熔融淬火技术合成了掺杂三价Tm3+、Er3+离子和金属Ag纳米颗粒（NPs）的亚碲酸盐玻璃，并研究了其近红外光致发光性能。测量了差示扫描量热仪（DSC）曲线、X射线衍射（XRD）图、透射电子显微镜（TEM）图像、吸收光谱、发射光谱和荧光衰减曲线。 DSC曲线和XRD图谱分别证明了所制备的亚碲酸盐玻璃具有良好的热稳定性和非晶态性质。吸收光谱揭示了紫外到近红外光谱范围内的电子跃迁，并通过计算 Tm3+(Er3+) 离子的自发辐射跃迁参数和增益截面进一步用于评估近红外波段发光的潜力。在 808 nm 激光二极管 (LD) 的激发下，在 Tm3+/Er3+ 掺杂的亚碲酸盐玻璃中获得了半峰宽约为 160 nm 的宽带平坦近红外发射。这种宽带平坦近红外发射源自 Tm3+:3H4→3F4 跃迁 (~1.47 µm) 和 Er3+:4I13/2→4I15/2 跃迁 (~1.53 µm) 的光谱重叠，位于 1350–1650 nm 区域，同时覆盖 E + S + C + L 波段。通过 Tm3+/Er3+ 掺杂亚碲酸盐玻璃中的 TEM 图像证明，随着直径在 10-20 nm 范围内的 Ag NP 的沉淀，峰值发光强度增加了约 45%，这归因于局部电场的增加以及从 Ag 物质到 Tm3+(Er3+) 离子的可能的能量转移。结果表明，Tm3+/Er3+/Ag NPs掺杂亚碲酸盐玻璃在宽带光放大器、宽带光源等领域具有广阔的应用前景。
Tellurite glasses doped with trivalent Tm3+, Er3+ions and metal Ag nanoparticles (NPs) were synthesized by single-step melt-quenching technique, and the near-infrared photoluminescence property was investigated. Differential scanning calorimeter (DSC) curve, X-ray diffraction (XRD) pattern, transmission electron microscopy (TEM) image, absorption spectrum, emission spectrum and fluorescence decay curve were measured. The good thermal stability and amorphous state nature of the as-prepared tellurite glasses were demonstrated by the DSC curve and XRD pattern, respectively. Absorption spectrum disclosed the electronic transitions in the ultraviolet to near-infrared spectral range and was further used to evaluate the potential in near-infrared band luminescence by the calculations of spontaneous radiative transition parameters and gain cross-sections of Tm3+(Er3+) ions. Under the excitation of 808 nm laser diode (LD), a broadband flat near-infrared emission with FWHM of approximately 160 nm was obtained in the Tm3+/Er3+doped tellurite glass. This broadband flat near-infrared emission, originating from the spectral overlapping of Tm3+:3H4→3F4transition (~1.47 µm) and Er3+:4I13/2→4I15/2transition (~1.53 µm), was located in the 1350–1650 nm region and covered the E + S + C + L-bands simultaneously. With the precipitation of Ag NPs having diameter in the 10–20 nm range evidenced by TEM image in the Tm3+/Er3+doped tellurite glass, the peak luminescent intensity increased by about 45%, which is attributed to the increased local electric field and the possible energy transfer from the Ag species to Tm3+(Er3+) ions. The obtained results demonstrate that Tm3+/Er3+/Ag NPs doped tellurite glass is prospective for broadband optical amplifiers, broadband lighting sources and so on.