Electric current-driven spectral tunability of surface plasmon polaritons in gold coated tapered fibers
Electric current-driven spectral tunability of surface plasmon polaritons in gold coated tapered fibers
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DOI：
10.1063/1.5046991
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发表时间：
2018-09
期刊：
影响因子：
1.6
通讯作者：
Tilman A. K. Lühder;T. Wieduwilt;H. Schneidewind;M. Schmidt
中科院分区：
文献类型：
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作者：
Tilman A. K. Lühder;T. Wieduwilt;H. Schneidewind;M. Schmidt
在这里，我们介绍了电调谐表面等离子体激元的概念，使用电流驱动的散热，允许控制等离子体性质通过一个直接访问的数量。其关键思想是基于流过等离子体层的电流，通过对所涉及的介电介质之一的折射率进行温度施加的修改来改变等离子体色散和相位匹配条件。该方案在具有>50000 nm/RIU的灵敏度的电连接的等离子体光纤锥的示例上实验性地证明。通过施加电流，金属膜内部产生的耗散热加热周围的液体，相应地降低其折射率，从而将相位匹配条件修改为基本锥形模式。我们在≤ 80 mW的电功率下观察到了等离子体共振光谱向更短波长方向移动了300 nm，清楚地表明我们的概念对于需要对等离子体色散和共振波长进行精确实时和外部控制的应用非常重要。在这里，我们介绍了使用电流驱动散热电调谐表面等离子体极化激元的概念，允许通过直接访问的量来控制等离子体特性。其关键思想是基于流过等离子体层的电流，通过对所涉及的介电介质之一的折射率进行温度施加的修改来改变等离子体色散和相位匹配条件。该方案在具有>50000 nm/RIU的灵敏度的电连接的等离子体光纤锥的示例上实验性地证明。通过施加电流，金属膜内部产生的耗散热加热周围的液体，相应地降低其折射率，从而将相位匹配条件修改为基本锥形模式。我们观察到等离子体共振的光谱位移高达300 nm，朝向更短的波长，电力≤ 80 mW，清楚地表明，我们的概念是重要的应用程序，要求…
Here we introduce the concept of electrically tuning surface plasmon polaritons using current-driven heat dissipation, allowing controlling plasmonic properties via a straightforward-to-access quantity. The key idea is based on an electrical current flowing through the plasmonic layer, changing plasmon dispersion and phase-matching condition via a temperature-imposed modification of the refractive index of one of the dielectric media involved. This scheme was experimentally demonstrated on the example of an electrically connected plasmonic fiber taper that has sensitivities >50000 nm/RIU. By applying a current, dissipative heat generated inside metal film heats the surrounding liquid, reducing its refractive index correspondingly and thus modifying the phase-matching condition to the fundamental taper mode. We observed spectral shifts of the plasmonic resonance up to 300 nm towards shorter wavelength by an electrical power of ≤ 80 mW, clearly showing that our concept is important for applications that demand precise real-time and external control on plasmonic dispersion and resonance wavelengths.Here we introduce the concept of electrically tuning surface plasmon polaritons using current-driven heat dissipation, allowing controlling plasmonic properties via a straightforward-to-access quantity. The key idea is based on an electrical current flowing through the plasmonic layer, changing plasmon dispersion and phase-matching condition via a temperature-imposed modification of the refractive index of one of the dielectric media involved. This scheme was experimentally demonstrated on the example of an electrically connected plasmonic fiber taper that has sensitivities >50000 nm/RIU. By applying a current, dissipative heat generated inside metal film heats the surrounding liquid, reducing its refractive index correspondingly and thus modifying the phase-matching condition to the fundamental taper mode. We observed spectral shifts of the plasmonic resonance up to 300 nm towards shorter wavelength by an electrical power of ≤ 80 mW, clearly showing that our concept is important for applications that dem...