A Biosensor Based on Bound States in the Continuum and Fano Resonances in a Solid–Liquid–Solid Triple Layer

We propose a simple solid–liquid–solid triple layer biosensor platform based on bound states in the continuum (BICs) and Fano resonances to detect acoustic properties of liquids apply method mixture water albumin with various concentrations. The is composed an epoxy as solid albumin–water liquid layer, entire system immersed water. In this work, we show that structure exhibits high sensitivity (S), quality factor (Q), figure merit (FOM) better detection limit (DL) vicinity BICs where transmission spectra exhibit resonances. shift towards frequencies concentration increases. can reach very small values for (4.7%). addition, given thickness sensing material, effect incidence angle efficiency sensor terms factor. proposed be designed from low-cost material used different types gases well.