Bavali A, Parvin P, Mortazavi S Z, Mohammadian M, Mousavi Pour M R
Appl Opt. 2014 Aug 20;53(24):5398-409. doi: 10.1364/AO.53.005398.
Red/blue shifts of laser-induced fluorescence (LIF) are investigated using several guest dielectric nanoscatterers, such as TiO2, ZnO, Al2O3, and SiO2, in the host Rd6G, RdB, Coumarin 4, and Coumarin 7 ethanolic solutions. A couple of inflection points are identified varying nanoparticle (NP) density into dye solutions based on LIF spectroscopy. The inflection of the spectral shift exhibits that the suspension of NPs in dye solutions significantly involves a couple of competitive chemical and optical mechanisms during photon traveling in scattering media regarding ballistic and diffusive transport. It is shown that the low, medium, and high NP additives in fluorescent suspension induce blue, red, and blue spectral shifts, respectively.
利用几种客体介电纳米散射体，如TiO₂、ZnO、Al₂O₃和SiO₂，在主体罗丹明6G（Rd6G）、罗丹明B（RdB）、香豆素4和香豆素7乙醇溶液中研究激光诱导荧光（LIF）的红移/蓝移。基于LIF光谱，在染料溶液中改变纳米颗粒（NP）密度时确定了几个拐点。光谱位移的拐点表明，在光子在散射介质中进行弹道和扩散传输时，NP在染料溶液中的悬浮液显著涉及几种竞争性的化学和光学机制。结果表明，荧光悬浮液中低、中、高NP添加剂分别诱导蓝移、红移和蓝移。
