Terahertz photodetector based on two-dimensional tellurene

1.Lanzhou Jiaotong University;2.Donghua University;3.Shanghai Institute of Technical Physics Chinese Academy of Sciences

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the Fund of Tianyou Youth Talent Lift Program of Lanzhou Jiaotong University

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    The abundant physical, chemical and biological information of terahertz wave makes the optical detection technology of this wave band have important application potential in civil and military fields. Two-dimensional (2D) materials, such as graphene, black phosphorus, etc., have been proven to be candidates for high-performance infrared-terahertz photodetectors and have been extensively studied. However, problems such as the dark current of graphene and the instability of black phosphorus in the air hinder the rapid development of terahertz detection at room temperature. In this work, a metal-tellurene-metal terahertz photodetector, and realized optical detection under millimeter wave-terahertz wave are fabricated. The results show that the terahertz photodetector based on logarithmic antenna tellurene has a high optical responsivity (40mA/W, 0.12THz) under zero bias, a response time of 8μs, and a noise equivalent power (NEP) of 4 pW?Hz^(0.5). This research results provide a new development path for high-performance room temperature terahertz optical detection.

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  • Received:November 12,2021
  • Revised:November 30,2021
  • Adopted:December 02,2021
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