Coherent Radiation From Active Josephson Antennas

被引：2

作者：

Galin, Mikhail A. ^{[1
,2
]}

Kurin, Vladislav V. ^{[1
]}

Shereshevsky, Ilya A. ^{[1
,2
]}

Vdovicheva, Nadezhda K. ^{[1
]}

Antonov, Alexander V. ^{[1
]}

Andreev, Boris A. ^{[1
]}

Klushin, Alexander M. ^{[1
]}

机构：

[1] RAS, Inst Phys Microstruct, Nizhnii Novgorod 603950, Russia

[2] Sirius Univ Sci & Technol, Soci 354340, Russia

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2021年 / 31卷 / 05期

基金：

俄罗斯科学基金会; 俄罗斯基础研究基金会;

关键词：

Josephson junctions; Spectroscopy; Signal resolution; Spatial coherence; Finite difference methods;

D O I：

10.1109/TASC.2021.3064533

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Y We performed spectral measurements of two low-temperature discrete Josephson junction (JJ) arrays on a Fourier-transform spectrometer. The arrays contain up to 9000 niobium based junctions located in the area 5 x 5 mm and composed of different designs. The spectrum of each array demonstrates a narrow peak in the frequency range near 140 GHz with the line width 160-170 MHz corresponding to the resolution limit of the spectrometer. It implies the coherent subterahertz radiation from niobium JJ arrays that is necessary for most applications where the JJ array based on similar technology would be implemented. The radiation coherence follows from numerical simulation of Josephson antennaswith the self-made algorithm combining the Finite-Difference Time Domain Method with the Resistively and Capacitively Shunted Junction (RCSJ) model. Exploring the spectrum of Beverage-like Josephson antenna simulated by this algorithm we revealed the pure monochromatic emission of all junctions.

引用

页数：5

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