Stacked Time-Varying Metasurfaces
Fuente:
arXiv
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915467863523328 |
|---|---|
| author | Movahediqomi, Mostafa Tretyakov, Sergei Asadchy, Viktar Wang, Xuchen |
| author_facet | Movahediqomi, Mostafa Tretyakov, Sergei Asadchy, Viktar Wang, Xuchen |
| contents | Spatiotemporal metasurfaces offer unique opportunities for wave manipulation, however, their practical realization is often constrained by the requirement for in-plane spatial modulation, which necessitates a large number of time-varying elements. In this work, we introduce an alternative architecture based on a cascade of spatially uniform metasurfaces subjected to periodic temporal modulation. Although all metasurfaces share the same modulation frequency, their individual modulation functions are independently engineered to achieve a desired complex electromagnetic response. We develop a general theoretical framework for the design and optimization of such stacked metasurface systems, composed of dense arrays of cylindrical meta-atoms with time-varying plasma and/or collision frequencies. The effectiveness of the approach is demonstrated through the optimization of metasurface designs that enable magnet-free isolation at the fundamental frequency and a temporal analogue of circulators. Furthermore, we show that a metasurface stack can be implemented using only a few time-modulated elements embedded within a parallel-plate waveguide, opening new avenues for extremely compact, versatile, and scalable spatiotemporal platforms for next-generation photonic and microwave systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_20506 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Stacked Time-Varying Metasurfaces Movahediqomi, Mostafa Tretyakov, Sergei Asadchy, Viktar Wang, Xuchen Optics Applied Physics 78-10 Spatiotemporal metasurfaces offer unique opportunities for wave manipulation, however, their practical realization is often constrained by the requirement for in-plane spatial modulation, which necessitates a large number of time-varying elements. In this work, we introduce an alternative architecture based on a cascade of spatially uniform metasurfaces subjected to periodic temporal modulation. Although all metasurfaces share the same modulation frequency, their individual modulation functions are independently engineered to achieve a desired complex electromagnetic response. We develop a general theoretical framework for the design and optimization of such stacked metasurface systems, composed of dense arrays of cylindrical meta-atoms with time-varying plasma and/or collision frequencies. The effectiveness of the approach is demonstrated through the optimization of metasurface designs that enable magnet-free isolation at the fundamental frequency and a temporal analogue of circulators. Furthermore, we show that a metasurface stack can be implemented using only a few time-modulated elements embedded within a parallel-plate waveguide, opening new avenues for extremely compact, versatile, and scalable spatiotemporal platforms for next-generation photonic and microwave systems. |
| title | Stacked Time-Varying Metasurfaces |
| topic | Optics Applied Physics 78-10 |
| url | https://arxiv.org/abs/2508.20506 |