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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 01, 2021
- Source ID
- 10.1088/1367-2630/ac1896
Entities
People
- D. A. Jaroszynski
- Jonathan Gratus
- Paul Kinsler
- Rebecca Seviour
Organizations
- Air Force Office of Scientific Research
- Engineering and Physical Sciences Research Council
- Horizon 2020
- Science and Technology Facilities Council