Deng Yuqiang, Sun Qing, Yu Jing, Lin Yandong, Wang Jinghui
Optics Division, National Institute of Metrology, Beijing 100013, China.
Opt Express. 2013 Mar 11;21(5):5737-42. doi: 10.1364/OE.21.005737.
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.
我们报道了一种用于太赫兹辐射测量的简单、宽带且高吸收的涂层。用自制的太赫兹时域光谱仪对该涂层在太赫兹区域的光谱特性进行了表征。测得的光谱反射率在0.2太赫兹至0.5太赫兹范围内小于0.3%，在0.5太赫兹至2.0太赫兹范围内小于0.1%。我们用这种涂层作为吸收体组装了一台太赫兹辐射计，并与碳纳米管阵列辐射计的热传递进行了比较。这种涂层在太赫兹区域和可见光区域都具有高吸收性；因此，该辐射计的响应度很容易追溯到国家激光功率标准。这种涂层易于制备。它在太赫兹源和探测器向国际单位制的溯源方面很有用。
