1 大连工业大学 化工与材料学院,辽宁 大连 116034
2 香港城市大学 电子工程系,香港 九龙
合成了稀土配合物Eu(TTFA)3(TTFA,2-thenoyltrifluoroacetone)掺杂的树脂型光刻胶薄膜,测定了薄膜的激发光谱和发射光谱。根据Judd-Ofelt理论,由发射光谱获得了Eu3+在光刻胶薄膜中的J-O参数Ω2=24.4×10-20 cm2,Ω4=2.8×10-20 cm2。利用得到的J-O参数计算了光刻胶薄膜中5D0激发态的辐射跃迁概率(977 s-1)和辐射寿命(1.02 ms),同时导出了光刻胶薄膜中Eu3+的5D0→7FJ(J=1,2,4)跃迁的受激发射截面σ和荧光分支比β。分析表明,Eu3+掺杂的光刻胶薄膜具有较长的亚稳态寿命以及较大的受激发射截面,是一种主动放大的光波导薄膜。其发射波长与光刻胶的低吸收损耗区很好地匹配,可用于研发聚合物光波导放大器和激光器。
稀土配合物 光刻胶薄膜 Judd-Ofelt参数 辐射跃迁概率 Rare-earth complex Photoresist film Judd-Ofelt parameters Radiative transition rates
Author Affiliations
Abstract
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2018002 Physical Chemistry of Luminescent Materials, University of Lyon, UMR CNRS 5620, Villeurbanne 69622, France
Yb-Er codoped Na2O-Al2O3-P2O5-xSiO2 glasses containing 0-20 mol% SiO2 were prepared successfully. The addition of SiO2 to the phosphate glass not only lengthens the bond between P^{5+} and non-bridging oxygen but also reduces the number of P=O bond. In contrast with silicate glass in which there is only four-fold coordinated Si^{4+}, most probably there coexist [SiO4 tetrahedron and [SiO6] octahedron in our glasses. Within the range of 0-20 mol% SiO2 addition, the stimulated emission cross-section of Er^{3+} ion only decreases no more than 10%. The Judd-Ofelt intensity parameters of Er^{3+}, \Omega_{2} does not change greatly, but \Omega_{4} and \Omega_{6} decrease obviously with increasing SiO2 addition, because the bond between Er^{3+} and O^{2-} is more strongly covalently bonded.
镱铒共掺磷酸盐玻璃 氧化硅 拉曼光谱 Judd-Ofelt参数 160.2750 Glass and other amorphous materials 160.5690 Rare-earth-doped materials 300.6450 Spectroscopy, Raman 300.6170 Spectra Chinese Optics Letters
2009, 7(1): 0156
