Lantigua Christopher, He Sha, Bouzan Milad Akhlaghi, Hayenga William, Johnson Noah J J, Almutairi Adah, Khajavikhan Mercedeh
Opt Lett. 2014 Jul 1;39(13):3710-3. doi: 10.1364/OL.39.003710.
We show that the upconversion emission spectra of Tm³⁺ and Yb³⁺ codoped β-NaYF₄-NaYF₄ core-shell nanoparticles can be judiciously modified by means of plasmonic nanocavities. Our analysis indicates that more than a 30-fold increase in conversion efficiency to the UV spectral band can be expected by engineering the NIR absorption and the local density of states. The effect of the nanocavity on the resulting radiation patterns is discussed. Our results are exemplified in cylindrical cavity geometries.
我们表明，通过等离子体纳米腔可以明智地修改Tm³⁺和Yb³⁺共掺杂的β-NaYF₄-NaYF₄核壳纳米颗粒的上转换发射光谱。我们的分析表明，通过设计近红外吸收和态密度，有望使紫外光谱带的转换效率提高30倍以上。讨论了纳米腔对所得辐射模式的影响。我们的结果以圆柱形腔几何结构为例进行了说明。
