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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Waveguide-coupled surface plasmon resonance sensor structures: Fano lineshape engineering for ultrahigh-resolution sensing
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Waveguide-coupled surface plasmon resonance sensor structures: Fano lineshape engineering for ultrahigh-resolution sensing

机译：波导耦合的表面等离子体激元共振传感器结构：用于超高分辨率传感的Fano线形工程

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摘要

We analyze in detail the plasmon-induced transparency and Fano resonance exhibited by a waveguide-coupled surface plasmon resonance sensor structure. It is shown that the results of electromagnetic calculations made for the structure agree very well with those of mechanical calculations made for two coupled harmonic oscillators. This implies that an analogy holds between the present electromagnetic system and the coupled-oscillator system. The analogy established allows us to conclude that the plasmon-induced transparency and Fano resonance are caused by the coupling between a surface plasmon polariton and a planar waveguide mode. Sensing action of the Fano resonance is also analyzed in detail. From the calculation of the figure of merit for the sensitivity by intensity, it is shown that there is an optimum condition for the coupling of the modes to achieve a maximum sensitivity. Under the optimum condition, the figure of merit is found to be three orders of magnitude higher than that of a conventional surface plasmon sensor.
机译：我们详细分析了由波导耦合的表面等离子体激元共振传感器结构表现出的等离子体激元诱导的透明性和法诺共振。结果表明，对该结构进行电磁计算的结果与对两个耦合谐波振荡器进行机械计算的结果非常吻合。这意味着在本电磁系统和耦合振荡器系统之间保持类比。建立的类比使我们可以得出结论，等离子体激元引起的透明性和Fano共振是由表面等离子体激元和平面波导模式之间的耦合引起的。还详细分析了Fano共振的传感作用。从强度灵敏度的品质因数的计算表明，存在耦合模式以达到最大灵敏度的最佳条件。在最佳条件下，发现品质因数比常规表面等离子体激元传感器的品质因数高三个数量级。

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