Investigation of superconducting transmission lines and tunnel junctions for detecting signals at frequencies above 1 THz.

N. V. Kinev; Кинев Н. В.; A. M. Chekushkin; Чекушкин А. М.; F. V. Khan; Хан Ф. В.; K. I. Rudakov; Рудаков К. И.

doi:10.31857/S0033849423090127

Investigation of superconducting transmission lines and tunnel junctions for detecting signals at frequencies above 1 THz.

Autores: Kinev N.¹, Chekushkin A.¹, Khan F.¹, Rudakov K.²
Afiliações:
1. Kotelnikov Institute of Radioengineering and Electronics, Russian Academy of Sciences
2. Editorial Ofice of the journal “Radio Engineering and Electronics”
Edição: Volume 68, Nº 9 (2023)
Páginas: 858-863
Seção: К 70-ЛЕТИЮ ИРЭ ИМ. В.А. КОТЕЛЬНИКОВА РАН
URL: https://journals.rcsi.science/0033-8494/article/view/138401
DOI: https://doi.org/10.31857/S0033849423090127
EDN: https://elibrary.ru/SCRCTR
ID: 138401

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Resumo

Superconducting integrated circuits based on NbTiN/Al transmission lines at frequencies up to 1.1 THz have been developed and experimentally studied. Numerical modeling of two microcircuit topologies with an operating frequency range of 0.9…1.2 THz, containing a slot antenna, made in a thin NbTiN film and matched in output to a microstrip transmission line, and a tunnel junction of the “superconductor–insulator–superconductor” (SIS) type with an area of the order of 1 μm^2, acting as a terahertz detector. Experimental samples of the microcircuit were manufactured and tested; in the experimental setup, a backward wave lamp (BWL) with an output frequency of up to 1.1 THz was used as a source. A powerful pumping of the SIS detector was obtained, thereby demonstrating the applicability of the manufactured NbTiN/Al transmission lines for operation in superconducting circuits at frequencies above 750 GHz, where traditionally used Nb/Nb transmission lines do not operate due to high attenuation.

Palavras-chave

Superconducting integrated circuit, microstrip transmission line, slot antenna, tunnel junction

Bibliografia

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