Sharp Asymmetric Line Shapes in a Plasmonic Waveguide System and its Application in Nanosensor
Sharp Asymmetric Line Shapes in a Plasmonic Waveguide System and its Application in Nanosensor
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等离激元波导系统中尖锐的不对称线形及其在纳米传感器中的应用
DOI：
10.1109/jlt.2015.2432041
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发表时间：
2015-08-01
影响因子：
4.7
通讯作者：
Xiao, Jinghua
中科院分区：
文献类型：
--
作者：
Chen, Zhao;Yu, Li;Xiao, Jinghua
数值预测了一种新颖紧凑的等离子体激元波导系统中尖锐的非对称线形。该系统由金属-绝缘体-金属波导耦合的环形谐振腔和凹槽组成。由于环形谐振腔和凹槽分别引起的窄离散谐振和宽频谱的相互作用，透射谱呈现出尖锐的不对称轮廓。仿真结果表明，通过改变结构参数，可以很容易地调节谱线的形状。的物理特性有助于一个高效的等离子体纳米传感器的折射率传感与1160 nm/RIU的灵敏度和3200的品质因数。这种等离子体激元结构具有如此高的品质因数，可能会在片上纳米传感器中找到重要的应用。
A sharp and asymmetric line shape is numerically predicted in a novel and compact plasmonic waveguide system. This system consists of a groove and a ring resonator coupled with a metal-insulator-metal waveguide. Due to the interaction of the narrow discrete resonance and a broad spectrum caused by the ring resonator and the groove, respectively, the transmission spectrum exhibits a sharp asymmetrical profile. Simulation results show that the spectral line shape can be easily tuned by changing the parameters of the structure. The physical features contribute to a highly efficient plasmonic nanosensor for refractive index sensing with the sensitivity of 1160 nm/RIU and a figure of merit of 3200. This plasmonic structure with such high figure of merits may find important applications in the on-chip nanosensors.