Accurate Measurement of Absolute Terahertz Power Using Broadband Calorimeter
Accurate Measurement of Absolute Terahertz Power Using Broadband Calorimeter
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DOI：
10.1007/s10762-018-0477-3
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发表时间：
2018-05-01
影响因子：
2.9
通讯作者：
Amemiya, Kuniaki
中科院分区：
文献类型：
--
作者：
Iida, Hitoshi;Kinoshita, Moto;Amemiya, Kuniaki
本文介绍了一种高灵敏度太赫兹（THz）量热计，该量热计采用磁负载环氧树脂作为宽带吸收体。利用太赫兹时域光谱仪和矢量网络分析仪测定，具有锥体纹理表面的吸收器的反射损耗小于0.04。太赫兹量热计成功地测量了室温下微瓦级光敏混合器的绝对太赫兹功率。在95%置信水平下，300 GHz下13 μ W的测量不确定度为6.2%，1thz下1.5 μ W的测量不确定度为5.6%。本文还详细介绍了评估和不确定度分析。
This paper presents a highly sensitive terahertz (THz) calorimeter developed using a magnetically loaded epoxy as a broadband absorber. The reflection loss of the absorber, which has a pyramidally textured surface, is less than 0.04, as determined using a THz time-domain spectrometer and a vector network analyzer. The THz calorimeter successfully enabled the measurement of the absolute THz power from a photomixer at microwatt levels at room temperature. The measurement uncertainties at a 95% confidence level were 6.2% for 13 mu W at 300 GHz and 5.6% for 1.5 mu W at 1 THz, respectively. Details of the evaluation and uncertainty analyses are also presented.