Fischer Stefan, Hallermann Florian, Eichelkraut Toni, von Plessen Gero, Krämer Karl W, Biner Daniel, Steinkemper Heiko, Hermle Martin, Goldschmidt Jan C
Fraunhofer Institute for Solar Energy Systems, Heidenhofstr. 2, 79110 Freiburg, Germany.
Opt Express. 2012 Jan 2;20(1):271-82. doi: 10.1364/OE.20.000271.
We investigate plasmon resonances in gold nanoparticles to enhance the quantum yield of upconverting materials. For this purpose, we use a rate equation model that describes the upconversion of trivalent erbium based upconverters. Changes of the optical field acting on the upconverter and the changes to the transition probabilities of the upconverter in the proximity of a gold nanoparticle are calculated using Mie theory and exact electrodynamic theory respectively. With this data, the influence on the luminescence of the upconverter is determined using the rate equation model. The results show that upconversion luminescence can be increased in the proximity of a spherical gold nanoparticle due to the change in the optical field and the modification of the transition rates.
我们研究金纳米颗粒中的等离子体共振，以提高上转换材料的量子产率。为此，我们使用了一个速率方程模型，该模型描述了基于三价铒的上转换材料的上转换过程。分别使用米氏理论和精确的电动力学理论计算作用在上转换材料上的光场变化以及金纳米颗粒附近上转换材料跃迁概率的变化。利用这些数据，通过速率方程模型确定对上转换材料发光的影响。结果表明，由于光场的变化和跃迁速率的改变，球形金纳米颗粒附近的上转换发光可以增强。
