Experimental study of the superconducting RFTES detector with bridge inductively coupled to a resonator
Rudenko N. Yu.
1, Chichkov V. I.
1, Shitov S. V.
1,21National University of Science and Technology MISiS, Moscow, Russia
2Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, Russia
Email: ny.rud@yandex.ru, sergey3e@gmail.com
The development and experimental study of the superconducting detector based on RFTES technology with inductive coupling of the thermistor microbridge made of hafnium in a quarter-wave resonator is described. An analysis of a model of the superconducting differential detector of the terahertz range, consisting of two RFTES detectors with different types of coupling in a quarter-wave resonator, providing a balance of losses in the resonator with simultaneous irradiation of both antennas, is carried out. The manufacturing technique and comparison of the calculated S-parameters with preliminary results of microwave measurements of the RFTES detector at a temperature of about 130 mK are presented. For warming up the RFTES detector with the carrier signal power, the following were obtained: maximum amplitude conversion slope 9· 108 W-1 and maximum frequency (phase) conversion slope during inductive frequency transition 3.2· 1013 Hz/W. Keywords: RFTES bolometer, high-Q resonator, differential detection, thin-film bridge, hafnium.
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