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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - On spacetime transformation optics
T2 - temporal and spatial dispersion
AU - Gratus, Jonathan
AU - Kinsler, Paul
AU - McCall, Martin W.
AU - Thompson, Robert T.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - The electromagnetic implementation of cloaking, the hiding of objects from sight by diverting and reassembling illuminating electromagnetic fields has now been with us ten years, while the notion of hiding events is now five. Both schemes as initially presented neglected the inevitable dispersion that arises when a designed medium replaces vacuum under transformation. Here we define a transformation design protocol that incorporates both spacetime transformations and dispersive material responses in a natural and rigorous way. We show how this methodology is applied to an event cloak designed to appear as a homogeneous and isotropic but dispersive medium. The consequences for spacetime transformation design in dispersive materials are discussed, and some parameter and bandwidth constraints identified.
AB - The electromagnetic implementation of cloaking, the hiding of objects from sight by diverting and reassembling illuminating electromagnetic fields has now been with us ten years, while the notion of hiding events is now five. Both schemes as initially presented neglected the inevitable dispersion that arises when a designed medium replaces vacuum under transformation. Here we define a transformation design protocol that incorporates both spacetime transformations and dispersive material responses in a natural and rigorous way. We show how this methodology is applied to an event cloak designed to appear as a homogeneous and isotropic but dispersive medium. The consequences for spacetime transformation design in dispersive materials are discussed, and some parameter and bandwidth constraints identified.
KW - physics.optics
KW - Transformation optics
KW - Spatial dispersion
U2 - 10.1088/1367-2630/18/12/123010
DO - 10.1088/1367-2630/18/12/123010
M3 - Journal article
VL - 18
JO - New Journal of Physics
JF - New Journal of Physics
SN - 1367-2630
M1 - 123010
ER -