Abstract
In this paper, a novel multi-channel refractive index sensor is proposed. The strong coupling between Tamm plasmon polariton (TPP) and defect modes of one-dimensional photonic crystals (1D-PCs) is used to design a high sensitivity sensor. The TPP is formed by topological insulators B i 1.5 S b 0.5 T e 1.8 S e 1.2 (BSTS) and 1D-PC. Within the 1D-PC, localized phase shifts are induced to form defect modes that can be hybridized with the TPP mode. More resonances can be formed by introducing additional defects in the 1D-PC. The proposed sensor provides great potential in the fields of multi-channel and multi-parameter sensing.
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