Abstract
The present study proposes a novel refractive index sensor utilizing asymmetric linear scattering frequency phenomena, which is formed by coupling a metal insulator metal (MIM) waveguide structure with an equilateral triangular ring cavity structure(ETRC). The transmission characteristics of the sensor structure were investigated using finite element method (FEM),with a focus on the effect of structure-related variables on sensing characteristics. Due to its advantages of small size, fast reaction speed, and flexibility, the designed sensor can achieve sensitivity and light efficiency values of 2880 nm RIU−1 and 50.53. In addition to this, the sensor structure can also be applied in the field of temperature detection with a sensitivity of up to 1.46 nm °C−1.
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