Acta Optica Sinica, Volume. 41, Issue 24, 2411002(2021)

A Light-Emitting Diode-Based Strong-Field Terahertz Camera

Shangqing Li1,2, Chen Ouyang1,2, Jinglong Ma1, Baolong Zhang1,2, Xiaojun Wu3、**, Jihong Xu4, and Yutong Li1,2,5、*
Author Affiliations
  • 1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 2School of Physical Sciences, Chinese Academy of Sciences, Beijing 100049, China
  • 3School of Electronic and Information Engineering, Beihang University, Beijing 100191, China
  • 4Beijing Office, Texas Instruments Inc., Beijing 100190, China
  • 5Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
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    A strong-pulsed-field terahertz camera based on light emitting diode (LED) is reported in this paper. It is based on the operational principle that LED can generate nanosecond pulse-duration photovoltaic signal with a reproducible response to picosecond pulse-duration intense terahertz irradiation due to impact ionization when terahertz electric field strength is larger than 50 kV/cm. By employing this effect, we fabricate scanning and array LED-terahertz cameras. These devices have successfully captured images of focused terahertz beam profile generated in lithium niobate via the tilted pulse front technique. The proposed camera has characteristics of low cost, strong photovoltaic signal, rapid response, and large imaging area. Meanwhile, it would give a new idea in developing terahertz imaging technology based on strong-field nonlinear effect.

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    Shangqing Li, Chen Ouyang, Jinglong Ma, Baolong Zhang, Xiaojun Wu, Jihong Xu, Yutong Li. A Light-Emitting Diode-Based Strong-Field Terahertz Camera[J]. Acta Optica Sinica, 2021, 41(24): 2411002

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    Paper Information

    Category: Imaging Systems

    Received: Apr. 12, 2021

    Accepted: Jun. 22, 2021

    Published Online: Nov. 30, 2021

    The Author Email: Wu Xiaojun (xiaojunwu@buaa.edu.cn), Li Yutong (ytli@iphy.ac.cn)

    DOI:10.3788/AOS202141.2411002

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