Graphene based terahertz amplitude modulation with metallic tortuous ring enhancement

The metallic tortuous hollow ring array in the metallic film is proposed to enhance the modulation efficiency of the graphene based terahertz (THz) amplitude modulation. In the tortuous ring configuration, multimode resonant is excited to enhance the interaction between the THz wave and the graphene...

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Bibliographic Details
Published in:Optics communications 2019-06, Vol.440, p.190-193
Main Authors: Xia, Liangping, Wang, Yu, Wang, GuangZhao, Long, Xiaojiang, Huang, Shijian, Tan, Yong, Yan, Wenjuan, Dang, Suihu, Yin, Shaoyun, Cui, Hongliang
Format: Article
Language:English
Subjects:
Enhancement
Graphene
Metallic structure
Modulation
Resonant
Terahertz
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Summary:The metallic tortuous hollow ring array in the metallic film is proposed to enhance the modulation efficiency of the graphene based terahertz (THz) amplitude modulation. In the tortuous ring configuration, multimode resonant is excited to enhance the interaction between the THz wave and the graphene. With the change of the chemical potential of the graphene layer, the resonant frequencies are shift and the transmission peaks are tuned. It is enhanced more than 9 times for the amplitude modulation depth of the THz transmission and a maximum modulation efficiency of 74 dB/eV is obtained in the tortuous ring array based modulator. The enhancement of the modulation efficiency will decrease of the applied modulation voltage and will help to the energy saving and device lifetime prolonging.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2019.02.012