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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 5 — Mar. 11, 2013
  • pp: 5737–5742

Broadband high-absorbance coating for terahertz radiometry

Yuqiang Deng, Qing Sun, Jing Yu, Yandong Lin, and Jinghui Wang  »View Author Affiliations

Optics Express, Vol. 21, Issue 5, pp. 5737-5742 (2013)

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We report a simple, broadband and high-absorbance coating for terahertz radiometry. The spectral properties of this coating in THz region were characterized with a home-made terahertz time-domain spectrometer. The measured spectral reflectance is less than 0.3% ranging from 0.2 THz to 0.5 THz and less than 0.1% ranging from 0.5 THz to 2.0 THz. We assembled a terahertz radiometer with this coating as absorber, and discussed its heat transfer in comparison with that of a carbon nanotube array radiometer. This coating is highly absorptive both in terahertz region and in visible light; therefore, the responsivity of this radiometer is easily traceable to National Laser Power Standards. This coating is easily fabricated. It is useful in traceability of terahertz sources and detectors to the SI units.

© 2013 OSA

OCIS Codes
(120.4800) Instrumentation, measurement, and metrology : Optical standards and testing
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(040.2235) Detectors : Far infrared or terahertz
(310.6188) Thin films : Spectral properties
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: November 16, 2012
Revised Manuscript: February 20, 2013
Manuscript Accepted: February 20, 2013
Published: March 1, 2013

Yuqiang Deng, Qing Sun, Jing Yu, Yandong Lin, and Jinghui Wang, "Broadband high-absorbance coating for terahertz radiometry," Opt. Express 21, 5737-5742 (2013)

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