Journal
NANOPHOTONICS
Volume 7, Issue 6, Pages 1117-1127Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/nanoph-2018-0012
Keywords
epsilon-near-zero; metamaterial; metasurface; photonic doping; zero-index material
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Funding
- Vannevar Bush Faculty Fellowship program - Basic Research Office of the Assistant Secretary of Defense for Research and Engineering
- U.S. Air Force Office of Scientific Research Multidisciplinary University Research Initiatives [FA9550-14-1-0389]
- Juan de la Cierva-Incorporacion Fellowship
- National Natural Science Foundation of China [61771280]
- Office of Naval Research [N00014-16-1-2029]
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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.
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