Symmetry breaking of the angular transmittance by a metagrating
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| Název: | Symmetry breaking of the angular transmittance by a metagrating |
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| Autoři: | Abouelatta, Mahmoud A.A., Martin, Olivier J.F., Achouri, Karim |
| Přispěvatelé: | MacDonald, Kevin F., Staude, Isabelle, Zayats, Anatoly V. |
| Informace o vydavateli: | SPIE |
| Rok vydání: | 2025 |
| Sbírka: | Ecole Polytechnique Fédérale Lausanne (EPFL): Infoscience |
| Témata: | angular response, Asymmetric metasurfaces, metagratings, spatial Fourier space |
| Popis: | Metasurfaces have opened the way for gaining control over the frequency and the polarization responses of electromagnetic waves. However, it is still challenging to control their electromagnetic angular response. Here, the potential of diffractive surfaces for breaking the symmetry of the angular transmittance is revealed. By engineering an asymmetric angular response for the scattering particle in each unit cell of the surface, it is possible to break the angular transmittance symmetry in a reciprocal, passive and lossless fashion. In this work, we introduce a metagrating which can filter the positive (or negative) side of the momentum space for obliquely impinging TM waves. Such a system could find several applications in optical analog signal processing. For example, the Schlieren imaging technique, which consists in filtering out half of the momentum space, would be feasible without the need for a bulky free-space system composed of multiple lenses or mirrors. ; NAM ; LEAP |
| Druh dokumentu: | conference object |
| Jazyk: | unknown |
| ISBN: | 978-1-5106-7298-7 1-5106-7298-2 |
| Relation: | Proceedings of SPIE - The International Society for Optical Engineering; 14 Metamaterials; https://infoscience.epfl.ch/handle/20.500.14299/245217 |
| DOI: | 10.1117/12.3022200 |
| Dostupnost: | https://doi.org/10.1117/12.3022200 https://infoscience.epfl.ch/handle/20.500.14299/245217 https://hdl.handle.net/20.500.14299/245217 |
| Rights: | false |
| Přístupové číslo: | edsbas.1BF7DBA9 |
| Databáze: | BASE |
Nájsť tento článok vo Web of Science | Abstrakt: | Metasurfaces have opened the way for gaining control over the frequency and the polarization responses of electromagnetic waves. However, it is still challenging to control their electromagnetic angular response. Here, the potential of diffractive surfaces for breaking the symmetry of the angular transmittance is revealed. By engineering an asymmetric angular response for the scattering particle in each unit cell of the surface, it is possible to break the angular transmittance symmetry in a reciprocal, passive and lossless fashion. In this work, we introduce a metagrating which can filter the positive (or negative) side of the momentum space for obliquely impinging TM waves. Such a system could find several applications in optical analog signal processing. For example, the Schlieren imaging technique, which consists in filtering out half of the momentum space, would be feasible without the need for a bulky free-space system composed of multiple lenses or mirrors. ; NAM ; LEAP |
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| ISBN: | 9781510672987 1510672982 |
| DOI: | 10.1117/12.3022200 |