Melnikov Anatoly R, Kalneus Evgeny V, Getmanov Yaroslav V, Shevchenko Darya A, Gerasimov Vasily V, Anisimov Oleg A, Fedin Matvey V, Veber Sergey L
International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 3a, Institutskaya Str., 630090 Novosibirsk, Russia.
Novosibirsk State University, 1, Pirogova Str., 630090 Novosibirsk, Russia.
Polymers (Basel). 2023 Oct 18;15(20):4124. doi: 10.3390/polym15204124.
The development of efficient and reliable sensors operating at room temperature is essential to advance the application of terahertz (THz) science and technology. Pyroelectric THz detectors are among the best candidates, taking into account their variety, outstanding performance, ease of fabrication, and robustness. In this work, we compare the performance of six different detectors, based on either LaTiO crystal or different polymeric films, using monochromatic radiation of the Novosibirsk Free Electron Laser facility (NovoFEL) in the frequency range of 0.9-2.0 THz. The main characteristics, including noise equivalent power and frequency response, were determined for all of them. Possible reasons for the differences in the obtained characteristics are discussed on the basis of the main physicochemical characteristics and optical properties of the sensitive area. At least three detectors showed sufficient sensitivity to monitor the shape and duration of the THz macropulses utilizing only a small fraction of the THz radiation from the primary beam. This capability is crucial for accurate characterization of THz radiation during the main experiment at various specialized endstations at synchrotrons and free electron lasers. As an example of such characterization, the typical stability of the average NovoFEL radiation power at the beamline of the electron paramagnetic resonance endstation was investigated.
开发在室温下运行的高效可靠传感器对于推动太赫兹（THz）科学技术的应用至关重要。热释电太赫兹探测器考虑到其种类繁多、性能卓越、易于制造和坚固耐用，是最佳候选者之一。在这项工作中，我们使用新西伯利亚自由电子激光设施（NovoFEL）在0.9 - 2.0太赫兹频率范围内的单色辐射，比较了基于LaTiO晶体或不同聚合物薄膜的六种不同探测器的性能。确定了所有探测器的主要特性，包括噪声等效功率和频率响应。基于敏感区域的主要物理化学特性和光学性质，讨论了所获得特性差异的可能原因。至少有三种探测器表现出足够的灵敏度，仅利用来自主光束的一小部分太赫兹辐射就能监测太赫兹巨脉冲的形状和持续时间。这种能力对于在同步加速器和自由电子激光的各种专门终端站进行的主要实验中准确表征太赫兹辐射至关重要。作为这种表征的一个例子，研究了电子顺磁共振终端站光束线上NovoFEL平均辐射功率的典型稳定性。
