Layer-Resolved Nonlinear Optics in Finite-Thickness Two-Dimensional Systems
Fuente:
arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866910282150838272 |
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| author | Ye, Liangting Wu, Chengzhi Jiang, Zeyu Huang, Bing |
| author_facet | Ye, Liangting Wu, Chengzhi Jiang, Zeyu Huang, Bing |
| contents | Nonlinear optical (NLO) responses in two-dimensional quantum-confined systems are typically described within bulk-based frameworks as macroscopic spatial averages. In finite-thickness van der Waals multilayers directly relevant to nanoscale devices, this picture substantially breaks down. Here, we establish a general symmetry-based framework for classifying second-order NLO responses in multilayers. We reveal a layer-resolved organization into skin, weak-skin, and hidden effects governed by local symmetry and stacking order. First-principles calculations for both nonmagnetic and spin-polarized systems confirm our predictions, demonstrating that stacking alone suffices to dramatically reshape both the spatial pattern and magnitude of the NLO response, a phenomenon not explainable within standard bulk theory. Our results establish stacking geometry as an effective knob for engineering surface-selective NLO responses in layered materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2606_02354 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Layer-Resolved Nonlinear Optics in Finite-Thickness Two-Dimensional Systems Ye, Liangting Wu, Chengzhi Jiang, Zeyu Huang, Bing Materials Science Optics Nonlinear optical (NLO) responses in two-dimensional quantum-confined systems are typically described within bulk-based frameworks as macroscopic spatial averages. In finite-thickness van der Waals multilayers directly relevant to nanoscale devices, this picture substantially breaks down. Here, we establish a general symmetry-based framework for classifying second-order NLO responses in multilayers. We reveal a layer-resolved organization into skin, weak-skin, and hidden effects governed by local symmetry and stacking order. First-principles calculations for both nonmagnetic and spin-polarized systems confirm our predictions, demonstrating that stacking alone suffices to dramatically reshape both the spatial pattern and magnitude of the NLO response, a phenomenon not explainable within standard bulk theory. Our results establish stacking geometry as an effective knob for engineering surface-selective NLO responses in layered materials. |
| title | Layer-Resolved Nonlinear Optics in Finite-Thickness Two-Dimensional Systems |
| topic | Materials Science Optics |
| url | https://arxiv.org/abs/2606.02354 |