Holding and amplifying electromagnetic waves with temporal non-foster metastructures Article Swipe
Víctor Pacheco‐Peña
,
Yasaman Kiasat
,
Diego M. Solís
,
Brian Edwards
,
Nader Engheta
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1038/s41467-025-57739-0
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1038/s41467-025-57739-0
We introduce a mechanism that can both hold and amplify electromagnetic waves by rapidly changing the permittivity of the medium during the wave travel from a positive to a dispersionless (i.e. non-Foster) negative value and then back again. The underlying physics behind this phenomenon is theoretically explored by considering plane wave and Gaussian pulse propagation in an unbounded medium. Interestingly, we show that a rapid positive-to-negative temporal change of ε(t) causes the propagation of the wave to stop (observed by a frozen phase in time) while the amplitude of the frozen field exponentially grows. Stepping the permittivity back to the original (or a new) positive value will cause the wave to thaw and resume propagation with the original (or the new) frequency, respectively. We numerically study the case of dipole radiation in such time-varying non-Foster structures. As a possible implementation, we propose a parallel plate waveguide platform loaded with time-dependent media emulating parallel lumped non-Foster negative capacitors. Such non-Foster time-varying structures may open new venues in controlling and manipulating wave-matter interaction.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1038/s41467-025-57739-0
- https://www.nature.com/articles/s41467-025-57739-0.pdf
- OA Status
- gold
- Cited By
- 6
- References
- 42
- Related Works
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- OpenAlex ID
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All OpenAlex metadata
Raw OpenAlex JSON
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https://doi.org/10.1038/s41467-025-57739-0Digital Object Identifier
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Holding and amplifying electromagnetic waves with temporal non-foster metastructuresWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2025Year of publication
- Publication date
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2025-03-20Full publication date if available
- Authors
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Víctor Pacheco‐Peña, Yasaman Kiasat, Diego M. Solís, Brian Edwards, Nader EnghetaList of authors in order
- Landing page
-
https://doi.org/10.1038/s41467-025-57739-0Publisher landing page
- PDF URL
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https://www.nature.com/articles/s41467-025-57739-0.pdfDirect link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
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goldOpen access status per OpenAlex
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https://www.nature.com/articles/s41467-025-57739-0.pdfDirect OA link when available
- Concepts
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Electromagnetic radiation, Physics, Neuroscience, Medicine, Biology, OpticsTop concepts (fields/topics) attached by OpenAlex
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6Total citation count in OpenAlex
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2025: 6Per-year citation counts (last 5 years)
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10Other works algorithmically related by OpenAlex
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