Nanophotonics and Metrology Laboratory, Swiss Federal Institute of Technology Lausanne (EPFL), 1015 Lausanne, Switzerland.
ACS Nano. 2012 Nov 27;6(11):9828-36. doi: 10.1021/nn3033612. Epub 2012 Oct 5.
The enhancement of fluorescence and Raman scattering by plasmonic nanostructures is studied theoretically with special focus on the effects of the observed molecule's properties and the realistic geometry of the plasmonic nanostructure. Numerical experiments show that the enhancement factor may vary by many orders of magnitude depending on a fluorophore's transition rates or intrinsic quantum yield. For different molecules, boosting fluorescence enhancement means optimizing different factors, leading to a different ideal geometric and spectral configuration. This framework, coupled with powerful new simulation tools, will facilitate the design and characterization of fluorescence-enhancing plasmonic nanostructures as well as yield experimental access to the intrinsic properties of the molecules under study.
本文从理论上研究了等离子体纳米结构对荧光和拉曼散射的增强作用，特别关注观察到的分子性质和等离子体纳米结构的实际几何形状的影响。数值实验表明，增强因子可能根据荧光团的跃迁速率或固有量子产率变化几个数量级。对于不同的分子，提高荧光增强意味着要优化不同的因素，从而导致不同的理想几何形状和光谱配置。这种框架与强大的新模拟工具相结合，将有助于设计和表征荧光增强的等离子体纳米结构，并为研究中的分子的固有特性提供实验方法。
