Nanorefractive index transducer using a ring cavity with an internal h-shaped cavity grounded on Fano resonance

• DOI: 10.1371/journal.pone.0301007
• Publication Date: 2024-05-17T18:14:59Z
• Authors: Shuwen Chang; Shubin Yan; Feng Liu; Jin Wang; Yuhao Cao; Biyi Huang; Chuanhui Zhu; Taiquan Wu; Yifeng Ren
• Keywords: Fano resonance; Figure of Merit; Fano plane; Waveguide

Building on the Fano resonance observation, a new refractive index transducer structure at nanoscale is proposed in this article, which consisting of metal-insulator-metal (MIM) waveguide coupled with ring cavity internally connected to an h-shaped (RCIhS). Using analytical method based COMSOL software and finite element (FEM), effect different geometric parameters trans-mission characteristics system simulated analyzed, turn illustrates structural output curves. As simulation results show, influential component resonance. By optimizing geometrical structure, finally accomplishes sensitivity (S) 2400 nm/RIU figure merit (FOM) 68.57. The sensor has also been demonstrated realm temperature detection, having tremendous potential for utilization future nano-sensing optically integrated systems.