Two ternary materials systems, which comprise two-photon initiators, oligomer and poly(methyl methacrylate), were prepared. A polymeric waveguide film was manufactured by spinning the materials on ITO, and the two-pho...Two ternary materials systems, which comprise two-photon initiators, oligomer and poly(methyl methacrylate), were prepared. A polymeric waveguide film was manufactured by spinning the materials on ITO, and the two-photon initiated photopolymerization(TPIP) was carried out successfully in the waveguide film. Consequently, an approach using TPIP is demonstrated for fabrication of grating in a thin polymeric film possessing waveguide properties. The results show that the resulted grating can manipulate and couple light.展开更多
为提高聚合物光波导放大器的增益性能,利用高温法合成了Ba Lu F5∶Yb3+,Er3+纳米晶,并分别对纳米晶的形貌、晶体结构和近红外发射特性进行了表征。测试结果表明,纳米晶平均粒径为13 nm,并在1 530 nm处具有较强的发射,荧光半高宽为50 nm...为提高聚合物光波导放大器的增益性能,利用高温法合成了Ba Lu F5∶Yb3+,Er3+纳米晶,并分别对纳米晶的形貌、晶体结构和近红外发射特性进行了表征。测试结果表明,纳米晶平均粒径为13 nm,并在1 530 nm处具有较强的发射,荧光半高宽为50 nm。将合成的纳米晶掺杂入SU-8聚合物作为光波导放大器的芯层材料,使用光刻显影等工艺,在表面长有二氧化硅的硅衬底上制备出了聚合物光波导放大器。当980 nm波长泵浦光功率为280 m W、信号光波长为1 530 nm且功率为0.1 m W时,在长度为1.1 cm的光波导放大器中,获得了3.95 d B的相对增益。展开更多
制作了基于KMnF_3∶Yb^(3+),Er^(3+)纳米晶材料的工作波长655 nm的聚合物平面光波导放大器。材料的吸收光谱表明,KMnF_3∶Yb^(3+),Er^(3+)纳米晶在980 nm附近有很强的吸收。在980 nm激光的激发下,由于Er^(3+)和Mn2+能级之间的能量传递,K...制作了基于KMnF_3∶Yb^(3+),Er^(3+)纳米晶材料的工作波长655 nm的聚合物平面光波导放大器。材料的吸收光谱表明,KMnF_3∶Yb^(3+),Er^(3+)纳米晶在980 nm附近有很强的吸收。在980 nm激光的激发下,由于Er^(3+)和Mn2+能级之间的能量传递,KMnF_3∶Yb^(3+),Er^(3+)纳米晶产生了很强的红色上转换发光。根据KMnF_3∶Yb^(3+),Er^(3+)纳米粒子的发光特性,制备了KMnF_3∶Yb^(3+),Er^(3+)NCs-PMMA复合材料,用其作为芯层设计了掩埋形结构光波导放大器,利用传统的半导体工艺完成器件制备。器件测试结果表明,当655 nm信号光功率为0.1 m W、980 nm泵浦功率为260 m W时,器件获得了2.7 d B的相对增益。展开更多
文摘Two ternary materials systems, which comprise two-photon initiators, oligomer and poly(methyl methacrylate), were prepared. A polymeric waveguide film was manufactured by spinning the materials on ITO, and the two-photon initiated photopolymerization(TPIP) was carried out successfully in the waveguide film. Consequently, an approach using TPIP is demonstrated for fabrication of grating in a thin polymeric film possessing waveguide properties. The results show that the resulted grating can manipulate and couple light.
基金the National Natural Science Foundation of China(10574058),Research Grants Council of Hong Kong,China(CityU1194/02E),and TWAS of UNESCO,Trieste,Italy,[RGA(01-137 RG/PHYS/AS)]
文摘为提高聚合物光波导放大器的增益性能,利用高温法合成了Ba Lu F5∶Yb3+,Er3+纳米晶,并分别对纳米晶的形貌、晶体结构和近红外发射特性进行了表征。测试结果表明,纳米晶平均粒径为13 nm,并在1 530 nm处具有较强的发射,荧光半高宽为50 nm。将合成的纳米晶掺杂入SU-8聚合物作为光波导放大器的芯层材料,使用光刻显影等工艺,在表面长有二氧化硅的硅衬底上制备出了聚合物光波导放大器。当980 nm波长泵浦光功率为280 m W、信号光波长为1 530 nm且功率为0.1 m W时,在长度为1.1 cm的光波导放大器中,获得了3.95 d B的相对增益。
文摘制作了基于KMnF_3∶Yb^(3+),Er^(3+)纳米晶材料的工作波长655 nm的聚合物平面光波导放大器。材料的吸收光谱表明,KMnF_3∶Yb^(3+),Er^(3+)纳米晶在980 nm附近有很强的吸收。在980 nm激光的激发下,由于Er^(3+)和Mn2+能级之间的能量传递,KMnF_3∶Yb^(3+),Er^(3+)纳米晶产生了很强的红色上转换发光。根据KMnF_3∶Yb^(3+),Er^(3+)纳米粒子的发光特性,制备了KMnF_3∶Yb^(3+),Er^(3+)NCs-PMMA复合材料,用其作为芯层设计了掩埋形结构光波导放大器,利用传统的半导体工艺完成器件制备。器件测试结果表明,当655 nm信号光功率为0.1 m W、980 nm泵浦功率为260 m W时,器件获得了2.7 d B的相对增益。
