Journal of Infrared and Millimeter Waves, Volume. 42, Issue 3, 362(2023)

Broadband terahertz detector based on topological insulator heterojunction

Chen-Yu YAO1,2, Li-Bo ZHANG1,3, Ying-Dong WEI1, Lin WANG1、*, Xiao-Shuang CHEN1,2,3, and Wei LU1,2
Author Affiliations
  • 1State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3College of Physics and Optoelectronic Engineering, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
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    Figures & Tables(4)
    (a)The schematic diagram of the atomic structure of Bi2Te3 and GeBi4Te7 materials,(b)the schematic diagram of the energy bands of a topological insulator,(c)Raman spectra of the two materials,(d)dipole antenna simulation results
    (a)The schematic diagram of device structure and test system,(b)IV curve of the device,the inset is an optical micrograph of the device,(c)the schematic diagram of the response mechanism,(d)spectrogram of the photoresponse,(e)curves of photocurrent and incident light power at different bias voltages,(f)rise/fall time of the device at zero bias
    (a)Response current versus modulation frequency at 0.112 and 0.27 THz,(b)photoresponse current versus modulation frequency,(c)waveforms of the device at different modulation frequencies at 0.27 THz,(d)waveform diagram of the device at 0.5 THz frequency,(e)photovoltage responsivity of the device under different biases of 0.112,0.27,and 0.5 THz,(f)NEP of three incident frequencies under different bias voltages at room temperature
    (a)The schematic diagram of scanning imaging optical path,(b)0.5 THz imaging results
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    Chen-Yu YAO, Li-Bo ZHANG, Ying-Dong WEI, Lin WANG, Xiao-Shuang CHEN, Wei LU. Broadband terahertz detector based on topological insulator heterojunction[J]. Journal of Infrared and Millimeter Waves, 2023, 42(3): 362

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    Paper Information

    Category: Research Articles

    Received: Dec. 5, 2022

    Accepted: --

    Published Online: Jul. 5, 2023

    The Author Email: Lin WANG (wanglin@mail.sitp.ac.cn)

    DOI:10.11972/j.issn.1001-9014.2023.03.011

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