Theoretical evaluation of the refractive index sensing capability using the coupling of Tamm–Fano resonance in one-dimensional photonic crystals

Biophotonic sensing techniques are an accurate best way for biosensing measurements. The main aim of the proposed device is to make a more effective sensor to detect the change in the refractive index of a sample. This sensor is based on the Tamm–Fano resonance in gold/porous semiconductor photonic crystal. Porous Gallium nitride has been used as an alternative multilayer Bragg reflector. The proposed structure composed of prism/Au/porous GaN/(GaN/porous GaN) N/substrate. The numerical studies for the proposed structure are calculated using the transfer matrix method. The sensitivity, FoM, and Q-factor observed from this device are 3 × 104 nm/RIU, 6.6 × 104 RIU−1, and 9 × 108. This study records sensitivity 2875 times higher than the experimental study of a similar structure in other wavelength range. The proposed sensor can be used in biosensing applications because it records high local environment sensitivity.