Abstract
We report on the detection of weak terahertz pulsed signals, generated by either a commercial photoconductive antenna or an electro-optic crystal pumped by femtosecond laser pulses, using high-sensitive kinetic inductance detectors. Average powers as low as 0.1 fW have been recorded. We observe an unexpected constant signal when the bias voltage of the photoconductive antenna is strongly reduced.
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Acknowledgments
We thank Drs. Christopher Bauerle and Giorgos Georgiou, both at Institute Néel in Grenoble, France, for putting at our disposal the fiber femtosecond laser during this work.
Funding
This study was funded by the French Research Agency (ANR) through the LabEx FOCUS ANR-11-LABX-0013 project.
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Soylu, G., Sanjuan, F., Hérault, E. et al. Detection of Weak Terahertz Pulsed Signals Using Kinetic Inductance Detectors. J Infrared Milli Terahz Waves 40, 31–37 (2019). https://doi.org/10.1007/s10762-018-0555-6
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DOI: https://doi.org/10.1007/s10762-018-0555-6