10.6084/M9.FIGSHARE.C.6219821.V2
Yi Zhang
Yi
Zhang
Liang Peng
Liang
Peng
zhengjie huang
zhengjie
huang
Lixin Ran
Lixin
Ran
Dexin Ye
Dexin
Ye
Ultra-wideband antireflection assisted by a continuously varying temporal medium
We demonstrate that reflectionless propagation of electromagnetic waves between two different materials can be achieved by designing an intermediate temporal medium, which can work in an ultra-wide frequency band. Such a temporal medium is designed with consideration of a multi-stage variation of the material’s permittivity in the time domain. The multi-stage temporal permittivity is formed by a cascaded quarter-wave temporal coating, which is an extension of the antireflection temporal coating by Pacheco-Peña et al [[1] Optica 7, 323 (2020)]. The strategy to render ultra-wideband antireflection temporal medium is discussed analytically and verified numerically. In-depth analysis shows that the multi-stage design of the temporal media implies a continuously temporal variation of the material’s constitutive parameters, thus an ultra-wideband antireflection temporal medium is reasonably obtained. As an illustrative example for application, the proposed temporal medium is adopted to realize impedance matching between a dielectric slab and free space, which validates our new findings.
Uncategorized
Optica Publishing Group
2022
2022-10-17
2022-10-17
Collection
10.6084/m9.figshare.c.6219821
CC BY 4.0