Terahertz Photomechanical Detector Based on Meta-surface Absorber and Enhanced Cantilevers

2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)(2022)

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摘要
Terahertz focal plane array imaging system has attracted much attention nowadays, this paper proposes a photomechanical terahertz detector, which is ideal for forming the focal plane array. The detector works at room temperature, and a meta-surface absorber is used to couple the incident terahertz radiation, so that a coupling efficiency higher than 90% can be obtained from 2.7 to 3.46THz. The bi-material cantilevers will produce a deformation corresponding to incident power, and the responsivity of detector is R=12.2μm/μW with a response time of 90ms. Thermal isolation between pixels is also considered and realized by introducing heat-insulating cantilevers.
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关键词
meta-surface absorber,incident terahertz radiation,coupling efficiency,bimaterial cantilevers,incident power,heat-insulating cantilevers,terahertz photomechanical detector,enhanced cantilevers,terahertz focal plane array imaging system,photomechanical terahertz detector,room temperature,time 90.0 ms,frequency 2.7 THz to 3.46 THz,temperature 293.0 K to 298.0 K
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