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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Temporal boundaries in electromagnetic materials
AU - Gratus, Jonathan
AU - Seviour, Rebecca
AU - Kinsler, Paul
AU - Jaroszynski, Dino A.
PY - 2021/8/19
Y1 - 2021/8/19
N2 - Temporally modulated optical media are important in both abstract and applied applications, 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. Further, 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.
AB - Temporally modulated optical media are important in both abstract and applied applications, 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. Further, 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.
KW - Time dependent consititutive relations
KW - electromagnetism
KW - dispersion
KW - time boundary
KW - permittivity
U2 - 10.1088/1367-2630/ac1896
DO - 10.1088/1367-2630/ac1896
M3 - Journal article
VL - 23
JO - New Journal of Physics
JF - New Journal of Physics
SN - 1367-2630
M1 - 083032
ER -