Nodal lines in a honeycomb plasmonic crystal with synthetic spin
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866913675460214784 |
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| author | Park, Sang Hyun Mele, E. J. Low, Tony |
| author_facet | Park, Sang Hyun Mele, E. J. Low, Tony |
| contents | We analyze a plasmonic model on a honeycomb lattice of metallic nanodisks that hosts nodal lines protected by local symmetries. Using both continuum and tight-binding models, we show that a combination of a synthetic time-reversal symmetry, inversion symmetry, and particle-hole symmetry enforce the existence of nodal lines enclosing the $\mathrm{K}$ and $\mathrm{K}'$ points. The nodal lines are not directly gapped even when these symmetries are weakly broken. The existence of the nodal lines is verified using full-wave electromagnetic simulations. We also show that the degeneracies at nodal lines can be relieved by introducing a Kekulé distortion that acts to mix the nodal lines near the $\mathrm{K},\mathrm{K}'$ points. Our findings open pathways for designing novel plasmonic and photonic devices without reliance on complex symmetry engineering, presenting a convenient platform for studying nodal structures in two-dimensional systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_00932 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Nodal lines in a honeycomb plasmonic crystal with synthetic spin Park, Sang Hyun Mele, E. J. Low, Tony Optics Mesoscale and Nanoscale Physics We analyze a plasmonic model on a honeycomb lattice of metallic nanodisks that hosts nodal lines protected by local symmetries. Using both continuum and tight-binding models, we show that a combination of a synthetic time-reversal symmetry, inversion symmetry, and particle-hole symmetry enforce the existence of nodal lines enclosing the $\mathrm{K}$ and $\mathrm{K}'$ points. The nodal lines are not directly gapped even when these symmetries are weakly broken. The existence of the nodal lines is verified using full-wave electromagnetic simulations. We also show that the degeneracies at nodal lines can be relieved by introducing a Kekulé distortion that acts to mix the nodal lines near the $\mathrm{K},\mathrm{K}'$ points. Our findings open pathways for designing novel plasmonic and photonic devices without reliance on complex symmetry engineering, presenting a convenient platform for studying nodal structures in two-dimensional systems. |
| title | Nodal lines in a honeycomb plasmonic crystal with synthetic spin |
| topic | Optics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2502.00932 |