Author Affiliations
Abstract
1 Professional Basic Department, Changzhou Vocational Institute of Mechatronic Technology, Changzhou 213164, China
2 Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China
3 Public Resource Trading Center, Municipal Administrative Services Management Bureau, Lianyungang 222006, China
The effects of the diameter of SiO2 nanopillars, the diameter of Ag nanospheres, the arrays’ period, and the medium environment on the plasmonic lattice resonance (PLR) formed by Ag nanospheres on SiO2 nanopillar arrays are systematically investigated. Larger diameters of SiO2 nanopillars with other parameters kept constant will widen the PLR peak, redshift the PLR wavelength, and weaken the PLR intensity. Larger diameters of Ag nanospheres with other parameters kept constant will widen the PLR peak, redshift the PLR wavelength, and strengthen the PLR intensity. Larger array periods or larger refractive index of medium environment corresponds to larger PLR wavelengths.
plasmonics diffraction theory resonance multilayer design Chinese Optics Letters
2020, 18(3): 033601
1 东南大学 电子科学与工程学院, 江苏 南京210096
2 三江学院 电子信息工程学院, 江苏 南京210012
采用高温固相法制备了不同掺杂浓度的YAG∶1%Ce3+,x%Yb3+ (x=5,10,15,20,25)系列荧光粉。在450 nm蓝光激发下, 测试了样品的发射光谱, 得到了中心波长在550 nm的可见宽带发射(Ce3+: 5d→4f)和1 030 nm的近红外发射(Yb3+: 2F5/2→2F7/2)。可见和近红外发射强度随Yb3+掺杂浓度的变化表明Ce3+到Yb3+存在能量传递过程, 并得到Yb3+的猝灭浓度为15%。在低温条件下(80~300 K)测试YAG∶1%Ce3+,15%Yb3+样品的发射光谱和拉曼光谱, 通过对其量子剪裁发光温度特性的分析, 描述了基质声子在Ce3+到Yb3+的能量传递过程中起到的重要作用。
量子剪裁 猝灭浓度 温度特性 能量传递 quantum cutting quenching concentration temperature characteristics energy transfer
