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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2505.09908 |
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| _version_ | 1866910944963067904 |
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| author | Xie, Wenzhu Wang, Yan Chen, Jingxuan Si, JiaHao Rao, Wei Wang, MingJin Zheng, WanHua |
| author_facet | Xie, Wenzhu Wang, Yan Chen, Jingxuan Si, JiaHao Rao, Wei Wang, MingJin Zheng, WanHua |
| contents | We present an analysis of the transmission spectra of the twisted bilayer photonic slabs using a modified rigorous coupled wave (RCWA) analysis, where the evanescent bases are replaced by bases with non-zero flux density. By utilizing the modified RCWA we demonstrate the calculation of eigenmodes, which has not been realized before. To counter for the transmission property, we propose a five-layer uniform slab approximation, with an accuracy around 0.04a/c, which is more straightforward and accessible for optical engineers compared to work by Lou et al. [Phys. Rev. Lett. 126, 136101]. The moiré pattern perturbation induces a split of resonance, which show great potential for engineering the band structure. Moreover, We observe two distinct transmission phases: the angle-dependent phase and Fabry-Pérot phase, which is explained by a coupled-mode theory (CMT) with expanded channels brought by the modified eigenmodes. Our work provides a theoretical framework for the design and optimization of twisted bilayer photonic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_09908 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Twist Bilayer Photonic slab's Angle-DependentGuided Resonance Analysis based on Multiple Scattering Xie, Wenzhu Wang, Yan Chen, Jingxuan Si, JiaHao Rao, Wei Wang, MingJin Zheng, WanHua Optics We present an analysis of the transmission spectra of the twisted bilayer photonic slabs using a modified rigorous coupled wave (RCWA) analysis, where the evanescent bases are replaced by bases with non-zero flux density. By utilizing the modified RCWA we demonstrate the calculation of eigenmodes, which has not been realized before. To counter for the transmission property, we propose a five-layer uniform slab approximation, with an accuracy around 0.04a/c, which is more straightforward and accessible for optical engineers compared to work by Lou et al. [Phys. Rev. Lett. 126, 136101]. The moiré pattern perturbation induces a split of resonance, which show great potential for engineering the band structure. Moreover, We observe two distinct transmission phases: the angle-dependent phase and Fabry-Pérot phase, which is explained by a coupled-mode theory (CMT) with expanded channels brought by the modified eigenmodes. Our work provides a theoretical framework for the design and optimization of twisted bilayer photonic devices. |
| title | Twist Bilayer Photonic slab's Angle-DependentGuided Resonance Analysis based on Multiple Scattering |
| topic | Optics |
| url | https://arxiv.org/abs/2505.09908 |