A metal–dielectric layered structure (silver layer and fluorescein–polyvinyl alcohol composite layer) was used in a reverse Kretschmann configuration to observe plasmon-coupled emission tuning (PCET) and emission enhancement. An emission peak shift of nearly 100 nm within an angle tuning range of 4.5° and a nearly 20-fold emission enhancement were observed. Biosensitivity can thus be increased by mapping the angular scale in surface plasmon resonance (SPR) to the wavelength scale in PCET. A precise correlation between PCET and SPR was achieved by comparing experimental results with simulations and hence proves to be a promising tool in the field of biosensors.

中文翻译：

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等离子耦合发射调谐和发射增强，用于生物传感器应用

金属-电介质层状结构（银层和荧光素-聚乙烯醇复合层）以反向Kretschmann配置使用，以观察等离激元耦合发射调谐（PCET）和发射增强。在4.5°的角度调谐范围内观察到近100 nm的发射峰位移和近20倍的发射增强。因此，可以通过将表面等离振子共振（SPR）中的角标度映射到PCET中的波长标度来提高生物敏感性。通过将实验结果与仿真结果进行比较，可以实现PCET和SPR之间的精确关联，因此被证明是生物传感器领域的有前途的工具。