Monday, May 29, 2017

Abstract-Terahertz unidirectional invisibility in grating-based structures

Tao Wang, Liner Zou, Yun Shen, Miao Yi, Xiaohua Deng

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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