Side-coupled liquid sensor and its array with magneto-optical photonic crystal.

In this paper, a side-coupled liquid sensor and its array based on magneto-optical photonic crystal are proposed. The sensitivity and quality factor of a single magneto-optical photonic crystal sensor are 0.492 mm/RIU and 181,760, respectively. After arraying, the sensitivity of the single microcavity sensor can reach from 0.1 to 0.35 mm/RIU, and the corresponding quality factor can reach from 5×104 to 7×104. Moreover, the structure has good robustness. This work will provide reference for the design of high-performance photonic crystal microcavity sensor arrays.