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Chinese Journal of Lasers, Volume. 46, Issue 6, 0614016(2019)

Terahertz Amplitude Modulator Based on Metasurface/Ion-Gel/Graphene Hybrid Structure

Yinghui Yuan1,2, Xieyu Chen2, Fangrong Hu1,3, Xianming Xiong1,3, Wentao Zhang1,3, and Jiaguang Han1,2、*
Author Affiliations
  • 1 School of Electronic Engineering and Automation, Guilin University of Electronic Technology,Guilin, Guangxi 541000, China
  • 2 Center for THz Waves, College of Precision Instrument and Optoelectronics Engineering,Tianjin University, Tianjin 300072, China
  • 3 Guangxi Key Laboratory of Optoelectronics Information Processing, Guilin, Guangxi 541000, China
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    Simulation results. (a) Structural diagram of sample; (b) terahertz transmission spectrum of metallic metasurface, and structural diagram of metasurface shown in embedded picture; (c) relative permittivity of ion-gel; (d) transmission spectra; field distributions at (e) Fermi level EF=0 eV and (f) EF=0.5 eV

    Fig. 1. Simulation results. (a) Structural diagram of sample; (b) terahertz transmission spectrum of metallic metasurface, and structural diagram of metasurface shown in embedded picture; (c) relative permittivity of ion-gel; (d) transmission spectra; field distributions at (e) Fermi level EF=0 eV and (f) EF=0.5 eV

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    Simulation results of samples with different characteristic sizes of metasurfaces. (a)(d) Transmission spectra;(b)(e) electric field distributions at EF=0 eV; (c)(f) electric field distributions at EF=0.5 eV

    Fig. 2. Simulation results of samples with different characteristic sizes of metasurfaces. (a)(d) Transmission spectra;(b)(e) electric field distributions at EF=0 eV; (c)(f) electric field distributions at EF=0.5 eV

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    Structural diagram and experimental results of terahertz amplitude modulator based on graphene/ion-gel/metasurface hybrid structure. (a) Structural diagram; (b) transmission spectra; (c) modulation depth versus frequency; (d) modulation depth versus external bias voltage

    Fig. 3. Structural diagram and experimental results of terahertz amplitude modulator based on graphene/ion-gel/metasurface hybrid structure. (a) Structural diagram; (b) transmission spectra; (c) modulation depth versus frequency; (d) modulation depth versus external bias voltage

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    Structural diagram and experimental results of terahertz amplitude modulator based on graphene/ion-gel.(a) Structural diagram; (b) transmission spectra; (c) modulation depth versus frequency

    Fig. 4. Structural diagram and experimental results of terahertz amplitude modulator based on graphene/ion-gel.(a) Structural diagram; (b) transmission spectra; (c) modulation depth versus frequency

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    Structural diagram and experimental results of terahertz amplitude modulator based on bilayer graphene.(a) Structural diagram; (b) transmission spectra; (c) modulation depth versus frequency; (d) modulation depth versus bias voltage

    Fig. 5. Structural diagram and experimental results of terahertz amplitude modulator based on bilayer graphene.(a) Structural diagram; (b) transmission spectra; (c) modulation depth versus frequency; (d) modulation depth versus bias voltage

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    Measurement of modulation speed. (a) Measurement setup; (b) measurement result

    Fig. 6. Measurement of modulation speed. (a) Measurement setup; (b) measurement result

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    Yinghui Yuan, Xieyu Chen, Fangrong Hu, Xianming Xiong, Wentao Zhang, Jiaguang Han. Terahertz Amplitude Modulator Based on Metasurface/Ion-Gel/Graphene Hybrid Structure[J]. Chinese Journal of Lasers, 2019, 46(6): 0614016

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    Paper Information

    Category: terahertz technology

    Received: Dec. 26, 2018

    Accepted: Mar. 4, 2019

    Published Online: Jun. 14, 2019

    The Author Email: Han Jiaguang (jiaghan@tju.edu.cn)

    DOI:10.3788/CJL201946.0614016

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology