Jiang Ping, Wang Yilin
School of Science Microelectronics & Data Science, Anhui University of Technology, Maanshan 243002, China.
College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China.
Nanomaterials (Basel). 2025 Apr 30;15(9):686. doi: 10.3390/nano15090686.
We designed and investigated a plasmonic nanosensor with ultra-high sensitivity and tunability, which is composed of a metal-insulator-metal (MIM) waveguide integrated with a side-coupled resonator (SR) and metal baffle. Its high performance is derived from Fano resonance, which is generated by the interaction between the modes of the SR and the baffle, and it can be precisely tuned by adjusting the parameters of the SR. Further investigation based on the incorporation of a side-coupled rectangular-ring resonator (SRR) generates three distinct Fano resonances, and the Fano resonance can be accurately tuned by manipulating the parameters of the resonators within the system. Our proposed plasmonic system can serve as a highly sensitive refractive index nanosensor, achieving a sensitivity up to 1150 nm/RIU. The plasmonic structures featuring independently tunable triple Fano resonances open new avenues for applications in nanosensing, bandstop filtering, and slow-light devices.
我们设计并研究了一种具有超高灵敏度和可调性的等离子体纳米传感器，它由一个集成了侧面耦合谐振器（SR）和金属挡板的金属-绝缘体-金属（MIM）波导组成。其高性能源于法诺共振，该共振由SR和挡板的模式之间的相互作用产生，并且可以通过调整SR的参数进行精确调谐。基于并入侧面耦合矩形环谐振器（SRR）的进一步研究产生了三种不同的法诺共振，并且通过操纵系统内谐振器的参数可以精确调谐法诺共振。我们提出的等离子体系统可以用作高灵敏度折射率纳米传感器，实现高达1150 nm/RIU的灵敏度。具有独立可调谐三重法诺共振的等离子体结构为纳米传感、带阻滤波和慢光器件的应用开辟了新途径。
