@article{dcdaa268e2844430a8df44d7341ef4b8,
title = "Temporal boundaries in electromagnetic materials",
abstract = "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.",
keywords = "electromagnetism, dispersion, permittivity, time boundary, Time boundary, Electromagnetism, Permittivity, Dispersion",
author = "Jonathan Gratus and Rebecca Seviour and Paul Kinsler and Jaroszynski, {Dino Anthony}",
note = "Funding Information: Original content from this work may be used under the terms of the . Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Air Force Office of Scientific Research FA8655-20-1-7002 Horizon 2020 Framework Programme 871124 Science and Technology Facilities Council ST/G008248/1 ST/P002056/1 Engineering and Physical Sciences Research Council EP/N028694/1 EP/T00097X/1 yes � 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft Creative Commons Attribution 4.0 licence Publisher Copyright: {\textcopyright} 2021 The Author(s). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",
year = "2021",
month = aug,
day = "19",
doi = "10.1088/1367-2630/ac1896",
language = "English",
volume = "23",
journal = "New Journal of Physics",
issn = "1367-2630",
publisher = "IOP Publishing Ltd.",
number = "8",
}