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Research on Superconducting Bolometer on Hot Electrons

Student: Zhandos Yerlanuly

Supervisor: Sergey Ryabchun

Faculty: HSE Tikhonov Moscow Institute of Electronics and Mathematics (MIEM HSE)

Educational Programme: Applied Physics (Master)

Final Grade: 8

Year of Graduation: 2017

Abstract We present the results of the operation of a fast and sensitive superconducting antenna-coupled direct detector of THz radiation based on the hot-electron bolometer (HEB) with AC current-bias. We demonstrate experimentally that this approach does not lead to significant deterioration of the HEB sensitivity compared to its value obtained when the same detector is in the DC-biased mode of operation. A numerical solution of the one-dimensional steady-state heat-balance equation for the electrons in the bolometer is used to calculate the value of the HEB responsivity. The results thus obtained are in good agreement with the experiment. We also discuss the possibility of implementation of the AC current-bias technique for frequency-domain multiplexing multi-element arrays of HEBs. This paper includes 4 chapters, 12 pictures and 63 sources.

Full text (added May 15, 2017)

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