Polarization-insensitive Fano resonance for dual resonance sensing in all-dielectric metasurface

Yaojie Zhou; Yan Li; Ye Li; Xiao-Qing Luo

doi:10.1117/12.3034157

5 July 2024 Polarization-insensitive Fano resonance for dual resonance sensing in all-dielectric metasurface

Yaojie Zhou, Yan Li, Ye Li, Xiao-Qing Luo

Proceedings Volume 13183, International Conference on Optoelectronic Information and Functional Materials (OIFM 2024); 131831C (2024) https://doi.org/10.1117/12.3034157
Event: The 3rd International Conference on Optoelectronic Information and Functional Materials (OIFM 2024), 2024, Wuhan, China

Abstract

Fano resonances (FRs) caused by the interference from the Mie resonances of the all-dielectric metasurfaces can facilitate the realization of stronger field enhancement, tunable wavelength selectivity, and highly sensitive optical sensors. However, single-resonance sensing poses a clear limitation in metasurface-based sensing in complex environments and may be inaccurate and unreliable, making the FRs-based dual-resonance sensing desired and remaining to be explored. Here, we propose polarization-insensitive all-dielectric metasurfaces for high-sensitive dual-resonance sensing in the near-infrared regions, which consist of C₄-symmetric quadrant unit cells. The two Mie resonant modes, dominated by the magnetic dipole and toroidal dipole, have been deployed to characterize polarization-insensitive magnetic FR, capable of supporting refractive index sensitivities of 815 nm/RIU and 456 nm/RIU at wavelengths of 1523 nm and 1585 nm, respectively. Our results may find potential applications in multi-channel sensing and optical modulators.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yaojie Zhou, Yan Li, Ye Li, and Xiao-Qing Luo "Polarization-insensitive Fano resonance for dual resonance sensing in all-dielectric metasurface", Proc. SPIE 13183, International Conference on Optoelectronic Information and Functional Materials (OIFM 2024), 131831C (5 July 2024); https://doi.org/10.1117/12.3034157

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