Work

Enhancing sensing performance through a metal-dielectric hybrid structure supporting hybridized TPP and symmetry-protected quasi-BIC

Year: 2024

Type: article

Abstract: We propose a metal-dielectric hybrid structure to enhance the quality ( Q ) 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 Q -factor. The simulation results indicated that both the central wavelengths and Q -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 ( S ) of up to 987.5 nm/RIU and 1237.5 nm/RIU while increasing the Q -factor to 923.79 and 542.73. Our work presents a promising opportunity to enhance the Q -factor while maintaining high S in lossy sensing systems.

Source: Optics Express

DOI: 10.1364/oe.544956

Authors: Jinhua Hu, Jiaxi Sun, Xiuhong Liu

Institution: Hebei University of Engineering

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: National Natural Science Foundation of China