Chinese Optics Letters, 2017, 15 (5): 051603, Published Online: Jul. 23, 2018  

Enhanced spatial terahertz modulation based on graphene metamaterial Download: 1144次

Author Affiliations
State Key Lab Incubation Base of Photoelectric Technology and Functional Materials, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, School of Physics, Institute of Photonics & Photon-Technology, Northwest University, Xi’an 710069, China
Abstract
The plasmonic mode in graphene metamaterial provides a new approach to manipulate terahertz (THz) waves. Graphene-based split ring resonator (SRR) metamaterial is proposed with the capacity for modulating transmitted THz waves under normal and oblique incidence. Here, we theoretically demonstrate that the resonant strength of the dipolar mode can be significantly enhanced by enlarging the arm-width of the SRR and by stacking graphene layers. The principal mechanism of light–matter interaction in graphene metamaterial provides a dynamical modulation based on the controllable graphene Fermi level. This graphene-based design paves the way for a myriad of important THz applications, such as optical modulators, absorbers, polarizers, etc.

Dandan Sun, Mengqi Wang, Yuanyuan Huang, Yixuan Zhou, Mei Qi, Man Jiang, Zhaoyu Ren. Enhanced spatial terahertz modulation based on graphene metamaterial[J]. Chinese Optics Letters, 2017, 15(5): 051603.

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