A three-dimensional polarization independent invisibility cloak by using multiband zero refraction metamaterials. (2nd November 2021)

• Record Type: Journal Article
• Authors: Luo, Tianzi; Jing, Xufeng; Gan, Haiyong; He, Yingwei; Li, Chenxia; Hong, Zhi
• Is Part Of: Laser physics. Volume 31:Number 11(2021)
• Publication Date: 2021-11-02
• Subjects: metamaterial -- zero refractive index -- multiband -- cloak; Lasers -- Periodicals; 621.36605
• DOI: 10.1088/1555-6611/ac31bc
• Languages: English
• ISSNs: 1054-660X

Abstract

Abstract: In this paper, we propose a zero-refractive index metamaterial (ZIM) with a simple structure, which is composed of dielectric spheres. The effective medium theory was used to invert the equivalent electromagnetic parameters of metamaterials. Metamaterials have nearly zero refractive index in the three bands of 17.96–19.46 GHz, 22.36–23.16 GHz and 23.68–24.32 GHz, respectively. Through monitoring the electric field and phase distribution at three zero frequencies, the zero refractive index characteristic is verified. Based on the proposed ZIM, a three-dimensional polarization-independent invisibility cloak within three wavebands was designed and numerically demonstrated.