论文标题
使用Kramers-Kronig关系设计折射率的液体
Designing Refractive Index Fluids using the Kramers-Kronig Relations
论文作者
论文摘要
对于许多光学应用，精确调整液体的折射率是有利的。在这里，我们为此目的利用了一个完善的光学概念。 Kramers-Kronig关系提供了（实际）折射率的光谱变化与吸收系数之间的物理联系。特别是，吸收系数的急剧光谱变化导致该变化的光谱附近折射率的增强或减少。通过使用满足这种吸收需求的明亮商品染料，我们证明了Kramers-Kronig关系在水溶液中的预测拨入折射率值中使用，否则这些液体仅通过有毒的专用液体才能实现。
For a number of optical applications, it is advantageous to precisely tune the refractive index of a liquid. Here, we harness a well-established concept in optics for this purpose. The Kramers-Kronig relation provides physical connection between the spectral variation of the (real) refractive index and the absorption coefficient. In particular a sharp spectral variation of the absorption coefficient gives rise to either an enhancement or reduction of the refractive index in the spectral vicinity of this variation. By using bright commodity dyes that fulfil this absorption requirement, we demonstrate the use of the Kramers-Kronig relation to predictively dial-in refractive index values in water solutions that are otherwise only attained by toxic specialised liquids.
