期刊
SENSORS
卷 15, 期 11, 页码 29183-29191出版社
MDPI
DOI: 10.3390/s151129183
关键词
surface plasmon polaritons; metal-insulator-metal waveguide; Fano resonance; refractive index sensor; finite-difference time-domain method
资金
- National Natural Science Foundation of China [91123036 61275166, 61178058]
- Natural Science Research Foundation of North University of China [110246]
- Program for the Top Young and Middle-aged Innovative Talents of Higher Learning Institutions of Shanxi
- North University of China Science Fund for Distinguished Young Scholars
A refractive index sensor composed of two straight metal-insulator-metal waveguides and a ring resonator is presented. One end of each straight waveguide is sealed and the other end acts as port. The transmission spectrum and magnetic field distribution of this sensor structure are simulated using finite-difference time-domain method (FDTD). The results show that an asymmetric line shape is observed in the transmission spectrum, and that the transmission spectrum shows a filter-like behavior. The quality factor and sensitivity are taken to characterize its sensing performance and filter properties. How structural parameters affect the sensing performance and filter properties is also studied.
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