Topology optimization of a superabsorbing thin-film semiconductor metasurface
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866918071780769792 |
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| author | Gedeon, Johannes Allayarov, Izzatjon Hassan, Emadeldeen Lesina, Antonio Calà |
| author_facet | Gedeon, Johannes Allayarov, Izzatjon Hassan, Emadeldeen Lesina, Antonio Calà |
| contents | We demonstrate a computational inverse design method for optimizing broadband-absorbing metasurfaces made of arbitrary dispersive media. Our figure of merit is the time-averaged instantaneous power dissipation in a single unit cell within a periodic array. Its time-domain formulation allows capturing the response of arbitrary dispersive media over any desired spectral range. Employing the time-domain adjoint method within a topology optimization framework enables the design of complex metasurface structures exhibiting unprecedented broadband absorption. We applied the method to a thin-film Silicon-on-insulator configuration and explored the impact of structural and (time-domain inherent) excitation parameters on performance over the visible-ultraviolet. Since our incorporated material model can represent any linear material, the method can also be applied to other all-dielectric, plasmonic, or hybrid configurations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_19352 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Topology optimization of a superabsorbing thin-film semiconductor metasurface Gedeon, Johannes Allayarov, Izzatjon Hassan, Emadeldeen Lesina, Antonio Calà Optics Computational Physics We demonstrate a computational inverse design method for optimizing broadband-absorbing metasurfaces made of arbitrary dispersive media. Our figure of merit is the time-averaged instantaneous power dissipation in a single unit cell within a periodic array. Its time-domain formulation allows capturing the response of arbitrary dispersive media over any desired spectral range. Employing the time-domain adjoint method within a topology optimization framework enables the design of complex metasurface structures exhibiting unprecedented broadband absorption. We applied the method to a thin-film Silicon-on-insulator configuration and explored the impact of structural and (time-domain inherent) excitation parameters on performance over the visible-ultraviolet. Since our incorporated material model can represent any linear material, the method can also be applied to other all-dielectric, plasmonic, or hybrid configurations. |
| title | Topology optimization of a superabsorbing thin-film semiconductor metasurface |
| topic | Optics Computational Physics |
| url | https://arxiv.org/abs/2502.19352 |