High-Q hybrid guided-mode resonances in dielectric gratings/DBR heterostructure

Lu Chen; Wu Fei; Long Chen; Haowei Ouyang; Leiming Zhou; Xiangyun Jiang; Chan Huang; Yuwei Fang; Jigang Hu

doi:10.1117/12.3035653

20 November 2024 High-Q hybrid guided-mode resonances in dielectric gratings/DBR heterostructure

Lu Chen, Wu Fei, Long Chen, Haowei Ouyang, Leiming Zhou, Xiangyun Jiang, Chan Huang, Yuwei Fang, Jigang Hu

Proceedings Volume 13244, Nano-optoelectronics and Micro/Nano-photonics X; 1324404 (2024) https://doi.org/10.1117/12.3035653
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Abstract

In this work, a dielectric grating/DBR heterostructure has been proposed to create a high-Q hybrid guided mode at nearinfrared (NIR) frequencies. It is found that this nontrivial guided mode can be excited in the dielectric grating/DBR structure, leading to a perfect light transmission with linewidth of about 0.1 nm and Q factor up to 1.3×10⁴. More intriguingly, we show that bound states in the continuum (BIC) can emerge by properly choosing parameters in this resonant regime. The resonant wavelength and Q-factor of this optical mode can be tuned by varying the geometrical parameters, which is polarization-independent under the vertical incident of light. The ultra-narrow linewidth and tunable resonant transmission offered by this simple all-dielectric structure opens new opportunities for developing optical filtering, sensing, and light emitting devices with high-performance.

Citation Download Citation

Lu Chen, Wu Fei, Long Chen, Haowei Ouyang, Leiming Zhou, Xiangyun Jiang, Chan Huang, Yuwei Fang, and Jigang Hu "High-Q hybrid guided-mode resonances in dielectric gratings/DBR heterostructure", Proc. SPIE 13244, Nano-optoelectronics and Micro/Nano-photonics X, 1324404 (20 November 2024); https://doi.org/10.1117/12.3035653

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