Detection of black body radiation using a compact terahertz imager
Detection of black body radiation using a compact terahertz imager
复制标题
DOI：
10.1063/5.0022533
复制
发表时间：
2020-12
影响因子：
4
通讯作者：
M. Hegedüs;K. Fedorov;I. Antonov;P. Karataev;V. Antonov
中科院分区：
文献类型：
--
作者：
M. Hegedüs;K. Fedorov;I. Antonov;P. Karataev;V. Antonov
我们检测太赫兹辐射的黑体物体在室温下发出的。该探头由半导体探测器耦合到一个紧凑的低温制冷机的冷指。探测器是二维电子气中的窄导电通道，通过等离子体波的激发和整流机制对光子通量的变化敏感。激发具有共振性质，具有出乎意料的窄FWHM，低于10%。这一概念的关键要素是一个紧凑的低温平台，它使我们能够使用高灵敏度的低温探测器，同时保持系统紧凑，34厘米的侧面，和移动的。我们歧视的黑体物体的温度变化小到1.0 K，在1米的距离。有空间进一步优化的探测器和光学系统，以提高温度分辨率下降到0.5 K和操作距离为5米，这是实际应用所需要的。
We detect terahertz radiation emitted by a blackbody object at room temperature. The probe consists of semiconductor detectors coupled to the cold finger of a compact cryo-cooler. The detectors are narrow conductive channels in two-dimensional electron gas, which is sensitive to variations of photon flux through the mechanism of excitation and rectification of plasma waves. The excitation has a resonant nature, with an unexpectedly narrow FWHM, below 10%. The key element of the concept is a compact cryo-platform, which enables us to use highly sensitive cryo-detectors, while keeping the system compact, ∼34 cm side, and mobile. We discriminate the temperature variation of the blackbody object as small as 1.0 K at a distance of 1 m. There is room for further optimization of the detectors and optical systems to boost the temperature resolution down to 0.5 K and the operation distance to 5 m, which are needed for practical applications.