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Optical Engineering

Resonance mode-switching in terahertz metamaterials based on varying gallium arsenide conductivity
Author(s): Xiaolong Cao; Jianquan Yao; Cai Yuan; Kai Zhong
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Paper Abstract

An asymmetric planar terahertz (THz) metamaterial (MM) is designed to be composed of two different single split-ring resonators (SRR) and its character is simulated in the THz region. Gallium arsenide (GaAs) is inserted between the gap of two separated single SRR, and through modulation of its conductivity (σ GaAs ) we achieved the switching of three different resonance modes and researched the influence of σ GaAs on transmission of MM. The resonant structure of MM can be switched from the two fundamental LC-modes to the new LC-mode and dipole resonance mode through the coupling LC-mode with the increasing σ GaAs . Such dynamical control of MM resonances provides an efficient way to manipulate electromagnetic wave to push mode-switching of resonance and could be implemented in terahertz devices to achieve additional functionalities.

Paper Details

Date Published: 4 February 2013
PDF: 5 pages
Opt. Eng. 52(2) 024001 doi: 10.1117/1.OE.52.2.024001
Published in: Optical Engineering Volume 52, Issue 2
Show Author Affiliations
Xiaolong Cao, Tianjin Univ. (China)
Jianquan Yao, Tianjin Univ. (China)
Cai Yuan, Tianjin Univ. (China)
Kai Zhong, Tianjin Univ. (China)

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