Reconfigurable epsilon-near-zero metasurfaces via photonic doping

Nanophotonics

article

Iñigo Liberal¹  Yue Li²  Nader Engheta² 

[1] Department of Electrical and Electronic Engineering, Public University of Navarre;Department of Electrical and Systems Engineering, University of Pennsylvania;Department of Electronic Engineering, Tsinghua University

关键词: epsilon-near-zero;    metamaterial;    metasurface;    photonic doping;    zero-index material;   

DOI  :  10.1515/nanoph-2018-0012

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

The next generation of flat optic devices aspires to a dynamic control of the wavefront characteristics. Here, we theoretically investigated the reconfigurable capabilities of an epsilon-near-zero (ENZ) metasurface augmented with resonant dielectric rods. We showed that the transmission spectrum of the metasurface is characterized by a Fano-like resonance, where the metasurface behavior changed from perfect magnetic conductor to epsilon-and-mu-near-zero material responses. The abrupt variation between these two extreme material responses suggests potential applications in dynamic metasurfaces. We highlighted the causality aspects of ENZ metasurfaces with a transient analysis and numerically investigated different reconfigurable mechanisms. Thus, this work introduces a new strategy for dynamic wavefront engineering.

【 授权许可】

CC BY