论文标题
天文杂项干涉法的中红外跨频带探测器的表征
Characterization of Mid-Infrared Intersubband Detectors for Astronomical Heterodyne Interferometry
论文作者
论文摘要
中红外天文杂项干涉法的主要挑战之一是其敏感性限制。能够处理几个GHz带宽的探测器已被确定为未来仪器的关键构件。基于异质结构的sublband探测器最近证明了它们提供此类性能的能力。在这项工作中，我们在非间隙杂项设置中以噪声，动态范围和带宽为角度来表征量子井红外的光电探测器。我们讨论了在天文系统上使用它们的可能性，以测量局部振荡器和天文信号之间的击败。
One of the major challenges of mid-infrared astronomical heterodyne interferometry is its sensitivity limitations. Detectors capable of handling several 10 GHz bandwidths have been identified as key building blocks of future instruments. Intersubband detectors based on heterostructures have recently demonstrated their ability to provide such performances. In this work we characterize a Quantum Well Infrared Photodetector in terms of noise, dynamic range and bandwidth in a non-interferometric heterodyne set-up. We discuss the possibility to use them on astronomical systems to measure the beating between the local oscillator and the astronomical signal.
