A high absorptance terahertz coating

Yuqiang Deng; Qing Sun; Jing Yu; Jinghui Wang; Yandong Lin

doi:10.1117/12.2021046

22 June 2013 A high absorptance terahertz coating

Yuqiang Deng, Qing Sun, Jing Yu, Jinghui Wang, Yandong Lin

Proceedings Volume 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013); 87692J (2013) https://doi.org/10.1117/12.2021046
Event: International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 2013, Singapore, Singapore

Abstract

We report an easily fabricated, broadband and high-absorbance coating for terahertz absolute radiometry. The spectral property of this coating was characterized in THz region with a home-made terahertz time-domain spectrometer. The measured results showed an extremely low spectral reflectance ranging from 0.1 THz to 2.0 THz. We assembled a terahertz radiometer with this coating as absorber. This coating is highly absorptive both in terahertz region and in visible light; therefore, the power responsivity of this radiometer is easily traceable to Chinese National Laser Power Standard. This coating is useful in traceability of terahertz sources and detectors to the SI units, and it will play an important role in infrared and far infrared absolute radiometry.

Citation Download Citation

Yuqiang Deng, Qing Sun, Jing Yu, Jinghui Wang, and Yandong Lin "A high absorptance terahertz coating", Proc. SPIE 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 87692J (22 June 2013); https://doi.org/10.1117/12.2021046

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