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Journal of Radio Electronics Online scientific journal · eISSN 1684-1719
2022, № 12 · RADIO ENGINEERING

Influence of YBaCuO josephson junction parameters on the characteristics of broadband detection

E.A. Matrozova1,2, D.V. Masterov1, S.A. Pavlov1, A.E. Parafin1, L.S. Revin1,2

1 Institute for Physics of Microstructures of RAS, Nizhni Novgorod, Russia
2 Superconducting Nanoelectronics Laboratory, Nizhny Novgorod State Technical University, n.a. R.E. Alekseev, Nizhnii Novgorod, Russia
Full text DOI: 10.30898/1684-1719.2022.12.4 UDC 53.05 EDN PJFVJV

Abstract

For Josephson bicrystal YBaCuO junctions 3-1.5 µm in size, the response to an external signal with a frequency of 165 GHz was measured. Receivers with similar ICRN values at helium temperatures and different RN values were chosen for the study. The amplitudes of the Shapiro steps were measured for various external signal powers and sample temperatures. The dependence of the output voltage noise on the operating point, temperature, and external signal power was measured. It is shown that fluctuations of the critical current have the greatest influence on the output noise of the receiver. The volt-watt responsivity and noise-equivalent power were evaluated for a 165 GHz external signal. The experimental results are compared with numerical calculations based on the model of a resistive-capacitive shunted Josephson junction. Optimal temperature operating ranges for the use of each structure were shown.

  • YBaCuO Josephson junction
  • grain boundary
  • broadband detector
  • responsivity
  • RCSJ model
Аннотация (на русском)

Влияние параметров YBaCuO джозефсоновского перехода на характеристики широкополосного детектирования

Для джозефсоновских бикристаллических YBaCuO переходов шириной 1,5 и 3 мкм измерен отклик на внешний сигнал частотой 165 ГГц. Для исследования были выбраны приемники с близкими значениями ICRN при гелиевых температурах и разными значениями RN . Измерены амплитуды ступеней Шапиро для различных мощностей внешнего сигнала и температур образцов. Измерена зависимость выходного шума по напряжению от рабочей точки, температуры, мощности внешнего сигнала. Показано, что флуктуации критического тока имеют наибольшее влияние на выходной шум приемника. Проведена оценка вольт-ваттной чувствительности и мощности эквивалентной шуму для частоты 165 ГГц. Проведено сравнение экспериментальных результатов с численными расчетами на основе модели резистивно-ёмкостного шунтированного джозефсоновского перехода. Показаны оптимальные рабочие диапазоны температур для каждой из структур.

For citation

Matrozova E.A., Masterov D.V., Pavlov S.A., Parafin A.E., Revin L.S. Influence of YBaCuO josephson junction parameters on the characteristics of broadband detection // Journal of Radio Electronics. – 2022. – No. 12. https://doi.org/10.30898/1684-1719.2022.12.4

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