Salient Features of Temporal and Spatio-Temporal Metamaterials
international conference on electromagnetics in advanced applications(2018)
摘要
In this communication we explore both analytically and numerically the exciting phenomena that can be obtained when the electromagnetic material parameters (permittivity and/or permeability) are rapidly changed in time. We will show how such a temporal change can be exploited to achieve phase conjugation of a monochromatic wave using a rapid periodic temporal variation of permittivity/permeability in a in a spatio-temporal slab/lens. Moreover, it will be also shown how a rapid variation of permittivity from a positive to a negative value in a physically (spatially) unbounded medium can lead to the enhancement of a stationary electromagnetic wave (i.e., a frozen field in the space without propagation).
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关键词
Temporal metamaterials,Time mirrors,Phase conjugation,epsilon-near-zero,Non-Foster circuits
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