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首页> 外文期刊>Nanotechnology >Back focal plane imaging of directional emission from dye molecules coupled to one-dimensional photonic crystals
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Back focal plane imaging of directional emission from dye molecules coupled to one-dimensional photonic crystals

机译：耦合至一维光子晶体的染料分子定向发射的后焦平面成像

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摘要

Bloch surface waves (BSWs) on one-dimensional photonic crystals (1DPCs) have been used to beam the fluorescence emission from the dye molecules. All dielectric 1DPC displays its low propagating loss, narrow resonance and the absence of absorption or quenching. In this paper, back focal plane imaging reveals that in addition to the BSW mode, a guided mode and###a cavity mode also exist in the 1DPC which all couple with the excited dye molecules. The appearance of these modes is sensitive to the wavelength of the fluorescence and alters the beaming effect by the 1DPC. Numerical simulations verify the existence of these modes which are consistent with the experimental results. Comparisons between the Bloch surface wave coupled emission and surface plasmon coupled emission are also presented for a clearer understanding of the multilayered film enabled directional emission.
机译：一维光子晶体（1DPC）上的Bloch表面波（BSW）已用于束缚染料分子发出的荧光。所有电介质1DPC都显示出低的传播损耗，狭窄的谐振以及没有吸收或猝灭的情况。在本文中，后焦平面成像显示，除了BSW模式外，在1DPC中还存在引导模式和空腔模式，它们都与激发的染料分子耦合。这些模式的出现对荧光的波长敏感，并通过1DPC改变光束效果。数值模拟验证了这些模式的存在与实验结果一致。还提出了Bloch表面波耦合发射和表面等离激元耦合发射之间的比较，以更清楚地了解多层膜启用的定向发射。

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