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Nanoscale. 2016 Aug 18;8(33):15273-80. doi: 10.1039/c5nr07114c.

Graphene-based tunable terahertz plasmon-induced transparency metamaterial.

Author information

1
College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China. zhaoxl412@163.com and Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA.
2
Department of Bioengineering, Clemson University, Clemson, SC 29634, USA.
3
Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA.
4
College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China. zhaoxl412@163.com.

Abstract

A novel terahertz plasmon induced transparency (PIT) metamaterial structure consisting of single-layered graphene microstructures was proposed and numerically studied in this study. A pronounced transparency peak was obtained in the transmission spectrum, which resulted from the destructive interference between the graphene dipole and monopole antennas. Further investigations have shown that the spectral location and lineshape of the transparency peak can be dynamically controlled by tuning the Fermi level in graphene. Since the monopole antennas in our designed structure exist in a continuous form, a more convenient method for tunablity is available by applying a gate voltage compared to those structures with discrete graphene patterns. This work may open up new avenues for designing tunable terahertz functional devices and slow light devices.

PMID:
27500393
DOI:
10.1039/c5nr07114c

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