Tunable Broad-Spectral Terahertz Absorber Based on Graphic Graphene

Zhao Xue; Haiting Zhang; Maosheng Yang; Xiaoxian Song; Jingjing Zhang; Yunxia Ye; Yunpeng Ren; Xudong Ren; Jianquan Yao

doi:10.3788/LOP202259.0530002

Laser & Optoelectronics Progress, Volume. 59, Issue 5, 0530002(2022)

Tunable Broad-Spectral Terahertz Absorber Based on Graphic Graphene

Zhao Xue^{1,1,2,2、">">}, Haiting Zhang^{1,1,2,2、">">}, Maosheng Yang^{1,1,2,2、">">}, Xiaoxian Song^{1,1,2,2,3、">">*}, Jingjing Zhang^{1,1,2,2、">">}, Yunxia Ye^{1,1,2,2、">">}, Yunpeng Ren^{1,1,2,2、">">}, Xudong Ren^{1,1,2,2、">">}, and Jianquan Yao^{1,1,2,2,3,3、">">">}

Author Affiliations

¹College of Information Science and Engineering, Jiangsu University, Zhenjiang , Jiangsu 212013, China

²Institute of Micro-Nano Optoelectronics and Terahertz Technology, Jiangsu University, Zhenjiang , Jiangsu 212013, China

³School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China

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Fig. 1. Schematic of absorber structure. (a) Schematic of graphene broadband tunable absorber; (b) absorber profile; (c) structural drawing of absorber surface

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Fig. 2. Absorption spectrum of graphene terahertz broadband absorber

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Fig. 3. Absorption versus thickness of the dielectric layer

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Fig. 4. Absorption curve of Fermi energy level of 0.1‒0.4 eV in graphene

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Fig. 5. Absorption curve of Fermi energy level of 0.4‒1.6 eV in graphene

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Fig. 6. Electric field distribution of broadband terahertz absorber at 1.53 THz. (a) Fermi energy level of graphene is 0.4 eV; (b) Fermi energy level of graphene is 1.6 eV

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Fig. 7. Current distribution on upper and lower surfaces of terahertz tunable broadband absorber at 1.53 THz frequency point when the Fermi energy level of graphene is 0.4 eV. (a) Upper surface; (b) lower surface

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Table 1. Structural dimensions of graphene-based terahertz absorbers
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Table 1. Structural dimensions of graphene-based terahertz absorbers
Parameter a b c d e p h₁ h₂
Value /μm 24 2 4 8 8 32 1 30

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Zhao Xue, Haiting Zhang, Maosheng Yang, Xiaoxian Song, Jingjing Zhang, Yunxia Ye, Yunpeng Ren, Xudong Ren, Jianquan Yao. Tunable Broad-Spectral Terahertz Absorber Based on Graphic Graphene[J]. Laser & Optoelectronics Progress, 2022, 59(5): 0530002

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