ArticleNanophotonics (Berlin, Germany)2025
Universal transient radiation dynamics by abrupt and soft temporal transitions in optical waveguides.
Article in Nanophotonics (Berlin, Germany), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- State-variable analysis of pulsed EM-fields in temporally layered media.Scientific reports · 2026Article
- Space-time graded-index interfaces and related chirping.Nanophotonics (Berlin, Germany) · 2025Article
- Special issue on spatiotemporal optical fields.Nanophotonics (Berlin, Germany) · 2025Article
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2 authors.
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Abstract
When an excited electromagnetically open optical waveguide goes through a temporal transition of its material properties, it radiates to the ambient surroundings. In this paper, we explore this radiation and reveal, using asymptotic evaluation of path integral in the complex frequency (Laplace) plane, a peculiar space-time dependence of its frequency. Specifically, we derive an asymptotically exact formula (Eq. (11)) for the instantaneous radiation frequency, which exhibits a chirp behavior with respect to time. This simple formula depends on the ambient properties and on the longitudinal wavenumber
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