Novel broad‐band excitation of Er3+ luminescence in chalcogenide glasses
Novel broad‐band excitation of Er3+ luminescence in chalcogenide glasses
复制标题
硫系玻璃中 Er3+ 发光的新型宽带激发
DOI：
10.1063/1.114094
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
S. G. Bishop
中科院分区：
文献类型：
--
作者：
S. Gu;S. Ramachandran;E. Reuter;D. A. Turnbull;J. Verdeyen;S. G. Bishop
对Er 2S 3掺杂的Ge 33 As 12 Se 55玻璃体样品进行的光致发光（PL）和光致发光激发（PLE）光谱表明，Er 3+掺入玻璃中的光学活性位点，并产生与在Er掺杂的氧化物玻璃中观察到的类似的宽的1500-1600 nm 4 I13/2→ 4 I15/2 PL光谱。1550 nm Er 3 +PL带的新PLE光谱包括分别归因于810和980 nm处的特征4 I 15/2→ 4 I 11/2和4 I 15/2→ 4 I 9/2 Er 3+吸收跃迁的相对尖锐的峰的叠加，在硫族化物玻璃中弱缺陷或杂质吸收尾的带隙下PLE带特性，其随着光子能量的降低而呈指数下降。在高能量下，指数上升的Urbach吸收边，这导致竞争的非辐射衰减机制，施加指数下降的斜率的PLE光谱。
Photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopy carried out on bulk samples of Er2S3‐doped Ge33As12Se55 glasses demonstrate that Er3+ is incorporated in optically active sites in the glass and gives rise to a broad ∼1500–1600 nm 4I13/2→4I15/2 PL spectrum similar to those observed in Er‐doped oxide glasses. The novel PLE spectrum of the 1550 nm Er3+PL band comprises a superposition of relatively sharp peaks which are attributable to the characteristic 4I15/2→4I11/2 and 4I15/2→4I9/2 Er3+ absorption transitions at 810 and 980 nm, respectively, and a broad, below‐gap PLE band characteristic of the weak defect or impurity absorption tails in chalcogenide glasses which decrease exponentially with decreasing photon energy. At high energy the exponentially rising Urbach absorption edge, which leads to competing nonradiative decay mechanisms, imposes an exponentially decreasing slope on the PLE spectrum.