Anisotropic non-Hermitian skin effect in a two-dimensional Lieb photonic crystal
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arXiv
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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866917507312386048 |
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| author | Xiong, Zhi-Kang Wen, Tianlei Liu, Y. Lin, Hai Zhou, Bin |
| author_facet | Xiong, Zhi-Kang Wen, Tianlei Liu, Y. Lin, Hai Zhou, Bin |
| contents | In this contribution paper, we construct a two-dimensional non-Hermitian (NH) photonic crystal (PhC) to prototype its anisotropic non-Hermitian skin effect (NHSE) for experimental proposal. Based on the tight-binding model for Lieb lattice with NH coupling, a nontrivial spectral winding number is pinpointed for certain eigenstates, which translates to geometry-dependent skin modes with tilt boundaries. For ease of implementation, complex refractive indices are employed for the Lieb unit cell of PhC to emulate the NH coupling. Validated by full wave simulation, our work underscores the boundary dependence of skin effect, and provides a concrete prototype design of NHSE implementable by state-of-the-art of topological metamaterial platforms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_19932 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Anisotropic non-Hermitian skin effect in a two-dimensional Lieb photonic crystal Xiong, Zhi-Kang Wen, Tianlei Liu, Y. Lin, Hai Zhou, Bin Optics Other Condensed Matter In this contribution paper, we construct a two-dimensional non-Hermitian (NH) photonic crystal (PhC) to prototype its anisotropic non-Hermitian skin effect (NHSE) for experimental proposal. Based on the tight-binding model for Lieb lattice with NH coupling, a nontrivial spectral winding number is pinpointed for certain eigenstates, which translates to geometry-dependent skin modes with tilt boundaries. For ease of implementation, complex refractive indices are employed for the Lieb unit cell of PhC to emulate the NH coupling. Validated by full wave simulation, our work underscores the boundary dependence of skin effect, and provides a concrete prototype design of NHSE implementable by state-of-the-art of topological metamaterial platforms. |
| title | Anisotropic non-Hermitian skin effect in a two-dimensional Lieb photonic crystal |
| topic | Optics Other Condensed Matter |
| url | https://arxiv.org/abs/2603.19932 |