Theoretical optimization of Tamm plasmon polariton structure for pressure sensing applications

In this paper, we investigate the characteristics of optical Tamm plasmon polariton states within the photonic band gap, which is formed at the interface of a metal and photonic crystal structure, for pressure sensing application. The numerical modeling of the proposed configuration is performed using the transfer matrix method through the assay of spectral characteristics. We extensively explain the dependency of the geometrical parameters on the position and intensity of the Tamm plasmon mode. Consequently, we optimize the thickness of the metallic layer, the thickness of different layers, the number of periods, and the incident angle. Tamm plasmon mode in the reflectance spectrum facilitates easy detection of various sensing parameters. At the optimized structural parameters, the measured sensitivity reaches up to 15.48 nm/GPa, the highest among the recently published similar works. Therefore, the proposed Tamm plasmon-based sensor can be a miniaturized structure with extreme sensitivity in pressure sensing models.