Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5397934 | Journal of Luminescence | 2017 | 5 Pages |
Abstract
Ag-capped β-NaYF4:Yb,Er micron rods were designed and fabricated to enhance their upconversion luminescence (UCL), which is in strong demand for various practical applications. Micro-spectral measurement was used to characterize the UCL of single rods. UCL of the Ag-capped β-NaYF4:Yb,Er micron rods is enhanced by 4-fold compared to that of bare rods on glass, based on statistics from 32 rods, while UCL of rods on Ag film is only enhanced by 0.8-fold. Combination with back scattering spectra of several typical Ag-capped micron rods lead us to conclude that the stronger tailoring effect on UCL of Ag-capped rods can be explained by the stronger resonance confinement of light in the Ag-capped micron-rod cavities. UCL enhancement and strong fluctuations both in intensity and intensity ratio can be ascribed to modulation of radiative transition rates in different degrees, caused by variation of photonic mode densities around the emission wavelengths in various cavities.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Jun Yang, Ai-Hua Li, Cuiyun Chen, Zhijun Sun,