Mixed-Resolution High-Q Sensor Based on Hybridized Spoof Localized Surface Plasmons

Spoof localized surface plasmons (LSPs) have proven significant advantages in sensing and detection. In this work, we propose a high- Q -factor and high-sensitivity hybridized spoof LSP sensor and a mixed-resolution algorithm. The sensor consists of two concentric inner and outer LSP structures with corrugated rings coupled to each other. The achieved Q -factor is up to 178, and the sensing figure of merit ( FoM ) is up to 30. Moreover, a mixed-resolution algorithm, combined with multiple resonant peaks, is proposed to enhance the Q -factor and sensing FoM . This algorithm doubles the Q -factor and sensing FoM effectively. This mixed-resolution sensor has a wide range of application prospects in the field of high-frequency on-chip resonators and sensors.