The enhancement of the Goos–Hänchen (GH) shift has become a research hotspot due to its promoted application of the GH effect in various fields. However, currently, the maximum GH shift is located at the reflectance dip, making it difficult to detect GH shift signals in practical applications. This paper proposes a new metasurface to achieve reflection-type bound states in the continuum (BIC). The GH shift can be significantly enhanced by the quasi-BIC with a high quality factor. The maximum GH shift can reach more than 400 times the resonant wavelength, and the maximum GH shift is located exactly at the reflection peak with unity reflectance, which can be applied to detect the GH shift signal. Finally, the metasurface is used to detect the variation in the refractive index, and the sensitivity can reach 3.58 × 10⁶ μm/RIU (refractive index unit) according to the simulation’s calculations. The findings provide a theoretical basis to prepare a metasurface with high refractive index sensitivity, a large GH shift, and high reflection.

SP-QBIC resonances are highly sensitive to asymmetry parameters. Meanwhile, achieving polarization-wavelength-stable QBIC resonances in metasurfaces remains challenging. To address these issues, this study proposes hetero-material out-of-plane (HOP) metasurfaces. First, the influence of the asymmetry parameter on the resonance spectra of the HOP asymmetric metasurfaces (AMS) is analyzed. Compared with in-plane (IP) AMS, the QBIC resonance wavelength of the HOP AMS remains essentially stable as the asymmetry parameter varies, and both the resonance linewidth and the quality (Q) factor exhibit stronger robustness—especially when the hetero-material is located up the symmetric metasurface (HOP_u). Second, the effect of the refractive index of the hetero-material n_l on the resonance spectra of the HOP_u AMS and (the hetero material is located below the symmetric metasurface) HOP_b AMS is investigated. As the n_l increases, the QBIC resonance wavelengths of HOP AMS red-shift; meanwhile, the Q factor of the HOP_u gradually decreases, whereas that of the HOP_b AMS remains almost unchanged. Simulations reveal that HOP AMS resonances exhibit strong robustness against device fabrication errors. Finally, by varying the incident light polarization angle, it is verified that the proposed HOP AMS enables excitation polarization wavelength stable QBIC resonance. The multipole decomposition elucidates the physical mechanism by which HOP AMS can excite polarization wavelength stable SP-QBIC resonances. The key structural parameters of the HOP AMS for exciting polarization wavelength stable SP-QBIC resonance were confirmed. This study provides a theoretical foundation for designing and fabricating metasurfaces that support resonance stable and polarization wavelength stable QBIC resonances.