Dynamically Adjusting Borophene-Based Plasmon-Induced Transparency in a Polymer-Separated Hybrid System for Broadband-Tunable Sensing

Borophene, an emerging two-dimensional (2D) material platform, is capable of supporting highly confined plasmonic modes in the visible and near-infrared wavebands. This provides a novel building block for light manipulation at deep subwavelength scale, thus making it well-suited designing ultracompact optical devices. Here, we theoretically explore borophene-based hybrid system comprising continuous borophene monolayer (CBM) sodium nanostrip gratings (SNGs), separated by polymer spacer layer. In such structure, dynamically tunable plasmon-induced transparency (PIT) effect can be achieved strongly coupling dark bright modes, while actively controlling borophene. mode generated through localized plasmon resonance SNGs when directly excited TM-polarized incident light. Meanwhile, corresponds to propagating surface (BSP) CBM waveguide, which cannot excited, but requires phase matching with assistance SNGs. The thickness layer has significant impact on strength two modes. Owing BSP mode, sensitive variations ambient refractive index (RI), this exhibits good RI-sensing performance (643.8 nm/RIU) associated wide range adjustable wavebands (1420–2150 nm) tuning electron density work offers concept active sensors dependent electrically gating borophene, promising applications next-generation point-of-care (PoC) biomedical diagnostic techniques.