利用射频磁控溅射法制备了掺铒TeO_(2)薄膜,探究了氧化铒靶溅射功率、Ar/O_(2)气体比例以及退火温度对薄膜发光特性的影响.实验结果表明,在氧化铒靶溅射功率为20 W、Ar/O_(2)气体流量比为5∶1、退火温度250℃时,薄膜呈现出良好的光致发...利用射频磁控溅射法制备了掺铒TeO_(2)薄膜,探究了氧化铒靶溅射功率、Ar/O_(2)气体比例以及退火温度对薄膜发光特性的影响.实验结果表明,在氧化铒靶溅射功率为20 W、Ar/O_(2)气体流量比为5∶1、退火温度250℃时,薄膜呈现出良好的光致发光性能.针对直接刻蚀掺铒薄膜层易引发表面粗糙等问题,设计并采用紫外光刻和等离子体刻蚀工艺制备了双层波导结构.使用截断法测得0.5 cm长的掺铒TeO_(2)波导在1310 nm波长处的最低光学损耗为0.607 d B/cm,放大性能测量表明在1545 nm波段,波导具有7.2 d B/cm的光学内增益.这些实验结果表明,掺铒TeO_(2)波导在平面集成波导放大器领域极具应用潜力.展开更多
Tb^(3+)-,Eu^(3+)-activated and Eu^(3+)/Tb^(3+)-coactivated TeO_(2)-Gd_(2)O_(3)-WO_(3)-ZnO(TGWZ)glasses with the density of about 6.60 g/cm^(3)were successfully synthesized by a melt-quenching method.These glass scinti...Tb^(3+)-,Eu^(3+)-activated and Eu^(3+)/Tb^(3+)-coactivated TeO_(2)-Gd_(2)O_(3)-WO_(3)-ZnO(TGWZ)glasses with the density of about 6.60 g/cm^(3)were successfully synthesized by a melt-quenching method.These glass scintillato rs show a line transmittance coefficient in excess of 80%in the strongest green-emitting regions of Tb^(3+)ions.The optimal concentration of incorporated Tb^(3+)and Eu^(3+)ions and the corresponding interaction mechanism are determined in both Tb^(3+)and Eu^(3+)-activated TGWZ glasses.Compared with that of Tb^(3+)-activated TGWZ glasses,the luminous intensity of the Eu^(3+)/Tb^(3+)-coactivated TGWZ glasses is enhanced by 7.6 times,which can be attributed to the effective energy transfer(ET)from Tb^(3+)to Eu^(3+)ions.By investigating the concentration-dependent optical properties of these glasses including transmittance,photoluminescence(excitation and emission spectra),photoluminescence decay,the mechanism of ET in Eu^(3+)/Tb^(3+)-coactivated TGWZ glass scintillators is obtained.Also,the potential scintillation properties of the TGWZ glass scintillators are discussed by X-excited luminescence(XEL)sp ectra and the corresponding X-ray dose response tailored by various current intensity within 0-240μA(which corresponds to 0-40000 mGy).展开更多
文摘利用射频磁控溅射法制备了掺铒TeO_(2)薄膜,探究了氧化铒靶溅射功率、Ar/O_(2)气体比例以及退火温度对薄膜发光特性的影响.实验结果表明,在氧化铒靶溅射功率为20 W、Ar/O_(2)气体流量比为5∶1、退火温度250℃时,薄膜呈现出良好的光致发光性能.针对直接刻蚀掺铒薄膜层易引发表面粗糙等问题,设计并采用紫外光刻和等离子体刻蚀工艺制备了双层波导结构.使用截断法测得0.5 cm长的掺铒TeO_(2)波导在1310 nm波长处的最低光学损耗为0.607 d B/cm,放大性能测量表明在1545 nm波段,波导具有7.2 d B/cm的光学内增益.这些实验结果表明,掺铒TeO_(2)波导在平面集成波导放大器领域极具应用潜力.
基金Project supported by the Natural Science Foundation of China(12065010)the Major Science and Technology Research and Development Project of Jiangxi Province(20223AAE01003)+3 种基金the Scientific Research Project of Jiangxi Provincial Department of Education(GJJ211005,GJJ2201656)the Jiangxi Provincial Natural Science Foundation(20224BAB211019,20224BAB211027)the Science and Technology Plan Project of Ji'an City(20233-117685)the opening fund of Key Laboratory of Rare Earths,the Chinese Academy of Sciences。
文摘Tb^(3+)-,Eu^(3+)-activated and Eu^(3+)/Tb^(3+)-coactivated TeO_(2)-Gd_(2)O_(3)-WO_(3)-ZnO(TGWZ)glasses with the density of about 6.60 g/cm^(3)were successfully synthesized by a melt-quenching method.These glass scintillato rs show a line transmittance coefficient in excess of 80%in the strongest green-emitting regions of Tb^(3+)ions.The optimal concentration of incorporated Tb^(3+)and Eu^(3+)ions and the corresponding interaction mechanism are determined in both Tb^(3+)and Eu^(3+)-activated TGWZ glasses.Compared with that of Tb^(3+)-activated TGWZ glasses,the luminous intensity of the Eu^(3+)/Tb^(3+)-coactivated TGWZ glasses is enhanced by 7.6 times,which can be attributed to the effective energy transfer(ET)from Tb^(3+)to Eu^(3+)ions.By investigating the concentration-dependent optical properties of these glasses including transmittance,photoluminescence(excitation and emission spectra),photoluminescence decay,the mechanism of ET in Eu^(3+)/Tb^(3+)-coactivated TGWZ glass scintillators is obtained.Also,the potential scintillation properties of the TGWZ glass scintillators are discussed by X-excited luminescence(XEL)sp ectra and the corresponding X-ray dose response tailored by various current intensity within 0-240μA(which corresponds to 0-40000 mGy).
