Gain and One-Way Propagation in Synthetically Moving non-Foster Gratings
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866913178204504064 |
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| author | Alex-Amor, Antonio Molero, Carlos Silveirinha, Mario G. |
| author_facet | Alex-Amor, Antonio Molero, Carlos Silveirinha, Mario G. |
| contents | In this paper, we analyze the electromagnetic properties of space-time grooved metal surfaces governed by uniform-velocity modulations. We begin by deriving the electromagnetic fields of a uniform-velocity-modulated parallel-plate waveguide (PPW) using Lorentz transformations, establishing it as the fundamental building block of a more complex space-time structures. We then analyze the dispersion and scattering characteristics of a space-time grooved surface and later extend the study to the interaction between two facing surfaces. Our findings show that these systems can indeed amplify electromagnetic waves and exhibit non-reciprocal as well as non-Foster behavior. Moreover, under specific conditions, they enable the formation of unidirectional propagation channels, effectively constraining light to be guided along a single direction. These results unveil new opportunities for the design of advanced electromagnetic and photonic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2606_01864 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Gain and One-Way Propagation in Synthetically Moving non-Foster Gratings Alex-Amor, Antonio Molero, Carlos Silveirinha, Mario G. Optics Applied Physics In this paper, we analyze the electromagnetic properties of space-time grooved metal surfaces governed by uniform-velocity modulations. We begin by deriving the electromagnetic fields of a uniform-velocity-modulated parallel-plate waveguide (PPW) using Lorentz transformations, establishing it as the fundamental building block of a more complex space-time structures. We then analyze the dispersion and scattering characteristics of a space-time grooved surface and later extend the study to the interaction between two facing surfaces. Our findings show that these systems can indeed amplify electromagnetic waves and exhibit non-reciprocal as well as non-Foster behavior. Moreover, under specific conditions, they enable the formation of unidirectional propagation channels, effectively constraining light to be guided along a single direction. These results unveil new opportunities for the design of advanced electromagnetic and photonic devices. |
| title | Gain and One-Way Propagation in Synthetically Moving non-Foster Gratings |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2606.01864 |