.png){kind=icon}
返回
Antireflection temporal coatings
.png){kind=icon}
OA
AI
DOI：10.1364/OPTICA.381175.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
It is known that complete transmission of waves through the interface between two different media can be achieved by proper impedance matching between them. One of the most common techniques for such reflectionless propagation is the quarter-wave impedance transformer, where an additional slab of material with proper material parameters and carefully engineered dimensions is added between the two media, minimizing reflections. Metamaterials, with properly designed spatial inhomogeneity, have exhibited unprecedented ability to tailor and manipulate waves, and recently temporal metamaterials have also gained much attention, enabling spatiotemporal control of wave propagation. Here a temporal analogue of the quarter-wave impedance transformer technique, which we name antireflection temporal coating, is proposed using time-dependent materials. The proposed technique is demonstrated, analytically and numerically, using metamaterials with a time-dependent permittivity. Comparison with the conventional (spatial) impedance-matching technique is shown, demonstrating that both impedance matching and frequency conversion are achieved with our proposed temporal version. As an illustrative example, the present technique is also applied to match two waveguides with different cross sections, demonstrating an example of scenarios where it may be applied. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Keyword:
ELECTROMAGNETIC-WAVES
NEGATIVE-INDEX
METAMATERIAL
TRANSMISSION
REALIZATION
REFLECTION
LIGHT
期刊
IF:
8.5
论文数:
2.4K
被引数:
2.1W
机构
引用论文
分享收藏
Gradient-index meta-surfaces as a bridge linking propagating waves and surface waves梯度折射率元表面作为连接传播波和表面波的桥梁.png)
NATURE MATERIALS
NATURE MATERIALSIF38.5
PREAI
分享收藏
查看更多内容