Metagratings on Low-Cost Substrates for Efficient Anomalous Reflection: Addressing Dielectric Loss
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866912828806397952 |
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| author | Diker, Oz Epstein, Ariel |
| author_facet | Diker, Oz Epstein, Ariel |
| contents | We present a theoretical framework and practical methodology for designing high-efficiency metagratings (MGs), sparse periodic arrangements of subwavelength polarizable particles (meta-atoms), on low-cost dielectric substrates with non-negligible losses. The formulation incorporates these losses and exploits multiple degrees of freedom to optimize beam manipulation efficiency within a simple realistic printed-circuit-board (PCB) configuration. Importantly, the various loss mechanisms are analyzed using a judiciously devised equivalent circuit model, providing insights on their respective contributions. We validate our theory by designing, fabricating, and experimentally characterizing an efficient FR4-based anomalous reflection PCB MG, demonstrating good agreement between analytical predictions, full-wave simulations, and laboratory measurements. This work opens avenues for realizing efficient, low-profile, beam manipulation devices at reduced cost, offering practical solutions to mitigate loss limitations in diverse material sets across the electromagnetic spectrum. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_11249 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Metagratings on Low-Cost Substrates for Efficient Anomalous Reflection: Addressing Dielectric Loss Diker, Oz Epstein, Ariel Applied Physics Optics We present a theoretical framework and practical methodology for designing high-efficiency metagratings (MGs), sparse periodic arrangements of subwavelength polarizable particles (meta-atoms), on low-cost dielectric substrates with non-negligible losses. The formulation incorporates these losses and exploits multiple degrees of freedom to optimize beam manipulation efficiency within a simple realistic printed-circuit-board (PCB) configuration. Importantly, the various loss mechanisms are analyzed using a judiciously devised equivalent circuit model, providing insights on their respective contributions. We validate our theory by designing, fabricating, and experimentally characterizing an efficient FR4-based anomalous reflection PCB MG, demonstrating good agreement between analytical predictions, full-wave simulations, and laboratory measurements. This work opens avenues for realizing efficient, low-profile, beam manipulation devices at reduced cost, offering practical solutions to mitigate loss limitations in diverse material sets across the electromagnetic spectrum. |
| title | Metagratings on Low-Cost Substrates for Efficient Anomalous Reflection: Addressing Dielectric Loss |
| topic | Applied Physics Optics |
| url | https://arxiv.org/abs/2601.11249 |