一种基于表面等离激元的新型光学温度传感器

In this paper, we present a novel optical temperature sensor based on a nanoscale surface plasmon polariton (SPP) resonator. A bimetal layer is applied in the structure to detect the changes in temperature. The resonance wavelength of the SPP resonator shifts with the deformation of the bimetal layer. The effect of temperature on the refractive index of the material is also discussed. The finite element method(FEM) is employed to numerically calculate the reflectance spectra. To our knowledge, it is the first design of an SPP temperature sensor based on thermal deformation, and this structure may be applied in the future integrated optical circuit.