Single frequency microwave cloaking and subwavelength imaging with curved wired media

Ilan Ktorza (1) , Lauris Ceresoli (1) , Stefan Enoch (1) , Sébastien Guenneau (2) , Redha Abdeddaim (3)

1 FRESNEL - Institut FRESNEL
2 EPSILON - EPSILON
3 HIPE - HIPE

We consider the cloaking properties of electromagnetic wired media deduced from arbitrary coordinate transformations. We propose an interpretation of invisibility via sub-wavelength imaging features. The quality of cloaking is assessed by the level of deformation of the image of a P-shaped source through the stretched wired media: the lesser the image deformation, the more effective the cloaking. We numerically and experimentally demonstrate a tetrahedral wired cloak with longer edge length about 7cm at a frequency of 1GHz (the cloak is thus subwavelength). The wired cloak has two functionalities: it can serve as a high-resolution imaging system over long distances, and it can also perform space transformations such as, but not limited to, cloaking at a single operation frequency

Keywords: INVISIBILITY CLOAK; VISIBLE-LIGHT; METAMATERIALS

Domains: Physics [physics]; Physics [physics]

Ilan Ktorza, Lauris Ceresoli, Stefan Enoch, Sébastien Guenneau, Redha Abdeddaim. Single frequency microwave cloaking and subwavelength imaging with curved wired media. Optics Express, 2015, 23, pp.10319-10326. ⟨10.1364/OE.23.010319⟩. ⟨hal-01214107⟩