We propose a metal-dielectric hybrid structure to enhance the quality () factor by strong coupling between the resonant guided mode (RGM) and higher-order Tamm plasmon polariton (TPP). Meanwhile, we found that symmetry-protected bound states in the continuum (SP-BIC) can be achieved by actively adjusting the angle of the incident light, thus increasing the degrees of freedom for modulating the -factor. The simulation results indicated that both the central wavelengths and -factors of resonant modes can be modulated and optimized by modifying relevant structural parameters. Furthermore, we theoretically investigated the potential application of this structure as a dual-band self-referencing sensor, achieving the sensitivity () of up to 987.5 nm/RIU and 1237.5 nm/RIU while increasing the -factor to 923.79 and 542.73. Our work presents a promising opportunity to enhance the -factor while maintaining high in lossy sensing systems.
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We propose a metal-dielectric hybrid structure to enhance the quality () factor by strong coupling between the resonant guided mode (RGM) and higher-order Tamm plasmon polariton (TPP). Meanwhile, we found that symmetry-protected bound states in the continuum (SP-BIC) can be achieved by actively adjusting the angle of the incident light, thus increasing the degrees of freedom for modulating the -factor. The simulation results indicated that both the central wavelengths and -factors of resonant modes can be modulated and optimized by modifying relevant structural parameters.
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