Electromagnetic Duality Symmetry-Protected Dirac-Like Cones
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arXiv
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| Hauptverfasser: | , , , , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866913938681102336 |
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| author | Yang, Muxuan Yan, Dongyang Gao, Lei Liu, Wei Lai, Yun Xu, Yadong Hang, Zhi Hong Luo, Jie |
| author_facet | Yang, Muxuan Yan, Dongyang Gao, Lei Liu, Wei Lai, Yun Xu, Yadong Hang, Zhi Hong Luo, Jie |
| contents | Dirac-like cones, featuring conical linear dispersions intersecting with flat bands, typically arise from accidental degeneracy of multiple modes that requires precise tuning of material and structural parameters, inherently limiting their robustness and applications. In this work, by introducing electromagnetic duality symmetry into photonic crystals, we demonstrate the emergence of intrinsically robust deterministic Dirac-like cones. We show that such symmetry (achieved through either self-dual particles or non-self-dual particle clusters with duality-glide symmetry) enforces double degeneracies for band structures of photonic crystals. Furthermore, by harnessing the joint duality-structural symmetry, multiple deterministic Dirac-like cones exhibiting exceptional resilience to lattice size variations can be obtained. Our introduction of an extra symmetry into photonic crystals establishes a profound connection between duality symmetry and Dirac physics, providing a robust platform for advanced photonic band engineering. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_14155 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Electromagnetic Duality Symmetry-Protected Dirac-Like Cones Yang, Muxuan Yan, Dongyang Gao, Lei Liu, Wei Lai, Yun Xu, Yadong Hang, Zhi Hong Luo, Jie Optics Classical Physics Dirac-like cones, featuring conical linear dispersions intersecting with flat bands, typically arise from accidental degeneracy of multiple modes that requires precise tuning of material and structural parameters, inherently limiting their robustness and applications. In this work, by introducing electromagnetic duality symmetry into photonic crystals, we demonstrate the emergence of intrinsically robust deterministic Dirac-like cones. We show that such symmetry (achieved through either self-dual particles or non-self-dual particle clusters with duality-glide symmetry) enforces double degeneracies for band structures of photonic crystals. Furthermore, by harnessing the joint duality-structural symmetry, multiple deterministic Dirac-like cones exhibiting exceptional resilience to lattice size variations can be obtained. Our introduction of an extra symmetry into photonic crystals establishes a profound connection between duality symmetry and Dirac physics, providing a robust platform for advanced photonic band engineering. |
| title | Electromagnetic Duality Symmetry-Protected Dirac-Like Cones |
| topic | Optics Classical Physics |
| url | https://arxiv.org/abs/2503.14155 |