Terahertz unidirectional invisibility in grating-based structures

Terahertz unidirectional invisibility in grating-based structures
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基于光栅的结构中的太赫兹单向隐形

DOI:
10.1080/09500340.2017.1330973
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发表时间:
2017-05
影响因子:
1.3
通讯作者:
沈云
沈云
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
沈云

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摘要提出了一种基于光栅的结构,实现了太赫兹波段的单向隐身。我们表明,严格的要求,单向不可见的折射率,可以灵活地满足在这种拟议的结构,由于可调的有效折射率属性的光栅层,通过调整其几何参数。所有这些行为都在GaAs光栅基结构的例子中得到了证明,照明约40 μm。我们的研究结果可能会导致各种新颖的太赫兹器件的光子集成电路的发展。
Abstract A grating-based structure is proposed to realize unidirectional invisibility in the terahertz range. We show that the strict demand on refractive index for unidirectional invisibility can be flexibly satisfied in such proposed structure due to the tunable effective refractive index property of the grating layer by adjusting its geometric parameters. All these behaviours are demonstrated in the example of GaAs grating-based structure illuminated around 40 μm. Our results may lead to the development of a variety of novel terahertz devices for photonic integrated circuits.
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