Plasmon-Induced Transparency and Refractive Index Sensing in Side-Coupled Stub-Hexagon Resonators
Plasmon-Induced Transparency and Refractive Index Sensing in Side-Coupled Stub-Hexagon Resonators
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DOI：
10.1007/s11468-017-0506-4
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发表时间：
2018-02
期刊：
影响因子：
3
通讯作者：
Chuan Wu;Huafeng Ding;Tianye Huang;Xu Wu;Bingwei Chen;K. Ren;S. Fu
中科院分区：
文献类型：
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作者：
Chuan Wu;Huafeng Ding;Tianye Huang;Xu Wu;Bingwei Chen;K. Ren;S. Fu
提出了一种由金属-绝缘体-金属（MIM）波导、短截线谐振器和六边形谐振器组成的纳米结构来实现等离子体激元诱导透明（PIT）响应。数值研究了不同几何参数下器件的特性。受益于窄的透明窗口和两个谐振器之间的长耦合长度，所提出的器件能够作为折射率（RI）传感的纳米传感器，其品质因数（FOM）分别为178和140 RIU− 1，RI分别为1和1.33。此外，FOM可以通过采用对称结构来进一步改善。
A nanoscale structure which comprises metal-insulator-metal (MIM) waveguide, stub resonator, and hexagonal resonator is proposed to realize plasmon-induced transparency (PIT) response. The characteristics of the device are numerically investigated with different geometrical parameters. Benefitting from the narrow transparency window and long coupling length between two resonators, the proposed devices are able to act as a nanosensor for refractive index (RI) sensing with figure-of-merit (FOM) of 178 and 140 RIU−1near RI of 1 and 1.33, respectively. Furthermore, the FOM can be further improved by employing symmetric structure.