Radiative decay engineering 6: fluorescence on one-dimensional photonic crystals.
Radiative decay engineering 6: fluorescence on one-dimensional photonic crystals.
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DOI：
10.1016/j.ab.2013.07.021
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发表时间：
2013-11-01
影响因子：
2.9
通讯作者：
Lakowicz JR
中科院分区：
文献类型：
--
作者：
Badugu R;Nowaczyk K;Descrovi E;Lakowicz JR
在过去的十年中，荧光团与金属颗粒和表面的相互作用已成为一个活跃的研究领域。荧光团与表面等离子体激元的这些近场相互作用导致亮度和定向发射增加。然而，使用金属提供了一些缺点，如在短的荧光团-金属距离处猝灭，由于有损耗的金属而增加的能量耗散速率。这些不利的影响预计不会在短期内出现。在本文中，我们描述了荧光团与一维（1D）光子晶体（PC）的相互作用，它具有交替层的尺寸，创建一个光子带隙（PBG）的光子晶体。PBG波长的自由传播光将被反射。然而，与金属类似，我们表明，荧光团在近场距离的1DPC与结构相互作用。我们的研究结果表明，这些荧光团可以相互作用的内部模式（IM）和布洛赫表面波（BSW）的1DPC。对于1DPC表面上的荧光团，发射主要通过1DPC发生并进入基板。我们将这两种现象统称为布拉格光栅耦合发射（BGCE）。在这里，我们描述我们的初步结果BGCE。1DPC制造简单，可以处理和重复使用而不会损坏。我们相信BGCE为荧光检测和传感的新形式提供了机会。
During the past decade the interactions of fluorophores with metallic particles and surfaces has become an active area of research. These near-field interactions of fluorophores with surface plasmons have resulted in increased brightness and directional emission. However, using metals provide some disadvantages, like quenching at short fluorophore-metal distances, increased rates of energy dissipation due to lossy metals. These unfavorable effects are not expected in dielectrics. In this paper we describe the interactions of fluorophores with one-dimensional (1D) photonic crystals (PCs), which have alternating layers of dielectrics with dimensions that create a photonic bandgap (PBG). Freely propagating light at the PBG wavelength will be reflected. However, similar with metals, we show that fluorophores within near-field distances of the 1DPC interacts with the structure. Our results demonstrated that these fluorophores can interact with both Internal Modes (IM) and Bloch Surface Waves (BSW) of the 1DPC. For fluorophores on the surface of the 1DPC the emission dominantly occurs through the 1DPC and into the substrate. We refer to these two phenomena together as Bragg Grating-Coupled Emission (BGCE). Here we describe our preliminary results on BGCE. 1DPCs are simple to fabricate and can be handled and reused without damage. We believe BGCE provide opportunities for new formats for fluorescence detection and sensing.
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