Temporal boundaries in electromagnetic materials

Jonathan Gratus, Rebecca Seviour, Paul Kinsler, Dino Anthony Jaroszynski

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Temporally modulated optical media are important in both abstract and applied situations, such as spacetime transformation optics, relativistic laser–plasma interactions, and dynamic metamaterials. Here we investigate the behaviour of temporal boundaries, and show that traditional approaches that assume constant dielectric properties, with loss incorporated as an imaginary part, necessarily lead to unphysical solutions. Furthermore, although physically reasonable predictions can be recovered with a narrowband approximation, we show that appropriate models should use materials with a temporal response and dispersive behaviour.
Original languageEnglish
Article number083032
Number of pages12
JournalNew Journal of Physics
Issue number8
Publication statusPublished - 19 Aug 2021


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