XXIX Symposium "Nanophysics and Nanoelectronics" in Nizhny Novgorod, March 10-14, 2025
Solids

Experimental study of the superconducting RFTES detector with inductive inclusion of the bridge in the resonator

N. Yu. Rudenko^a, V. I. Chichkov^a, S. V. Shitov<sup>ab

a</sup> National University of Science and Technology «MISIS», Moscow
^b Kotelnikov Institute of Radioengineering and Electronics of the Russian Academy of Sciences, Moscow

Abstract: The development and experimental study of the superconducting detector based on RFTES technology with inductive inclusion 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 inclusion 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 $\cdot$ 10$^8$ 1/W and maximum frequency (phase) conversion slope during inductive frequency transition 3.2 $\cdot$ 10$^{13}$ Hz/W.

Keywords: RFTES bolometer, high-Q resonator, differential detection, thin-film bridge, hafnium.

Received: 15.05.2025
Revised: 15.05.2025
Accepted: 15.05.2025

DOI: 10.61011/JTF.2025.09.61232.121-25

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