Performance analysis of surface plasmon resonance sensor with high-order absentee layer**Project supported by the National Natural Science Foundation of China (Grant Nos. 11547183 and 11547241), the Higher Education and High-quality and World-class Universities, China (Grant No. PY201612), the National Key Research and Development Program of China (Grant No. 2016YFB0302003), and the Natural Science Foundation of Beijing (Grant No. 2162033).

Abstract

A surface plasmon resonance (SPR) sensor with a high-order absentee layer on the top of metallic film is proposed. The performance of the SPR sensor with NaCl, MgO, TiO2 or AlAs high-order absentee layer is analyzed theoretically. The results indicate that the sensitivity and the full width at half maximum of those SPR sensors decrease with the increasing of the order of absentee layer, but the variation of the figure of merit (FOM) depends on the refractive index of absentee layer. By improving the order of absentee layer with high-refractive-index, the FOM of the SPR sensor can be enhanced. The maximum value of FOM for the SPR sensor with high-order TiO2 (or AlAs) absentee layer is 1.059% (or 2.587%) higher than the one with one-order absentee layer. It is believed the proposed SPR sensor with high-order absentee layer will be helpful for developing the high-performance SPR sensors.