Terahertz optical scanning imaging of motionless polyurethane insulation materials | Zendy

Qiu Fu Cheng | Zendy; Tan Zhiyong | Zendy; Wang Chang | Zendy; Fu Zhanglong | Zendy; Wan Wenjian | Zendy; Cao Juncheng | Zendy

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Terahertz optical scanning imaging of motionless polyurethane insulation materials

Author(s) -

Qiu Fu Cheng,

Tan Zhiyong,

Wang Chang,

Fu Zhanglong,

Wan Wenjian,

Cao Juncheng

Publication year - 2019

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

eISSN - 1350-911X

pISSN - 0013-5194

DOI - 10.1049/el.2019.2282

Subject(s) - terahertz radiation , materials science , polyurethane , optics , transmittance , optoelectronics , photomixing , terahertz spectroscopy and technology , spectrometer , quantum cascade laser , laser , far infrared laser , terahertz metamaterials , composite material , physics

The authors demonstrate a terahertz optical scanning imaging system which utilises a combined 3D translation platform. Three mirrors are installed on the three sliders of the platform to realise the terahertz beam scanning of the motionless object. A pulsed quantum‐cascade laser at the frequency of 4.3 THz and a fast quantum‐well photodetector are employed in this terahertz imaging system to research the polyurethane insulation materials. A Fourier transform spectrometer is applied to measure the transmittance of the polyurethane insulation materials from 2 to 8 THz. The terahertz images of the polyurethane foams with a badge or three drops of water are obtained with great contrast.

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