scholarly journals Flux-flow Josephson oscillator as the broadband tunable terahertz source to open space

2019 ◽  
Vol 125 (15) ◽  
pp. 151603 ◽  
Author(s):  
N. V. Kinev ◽  
K. I. Rudakov ◽  
L. V. Filippenko ◽  
A. M. Baryshev ◽  
V. P. Koshelets
Keyword(s):  
Open Space ◽  
Flux Flow ◽  
Terahertz Source ◽  
Josephson Oscillator

scholarly journals Terahertz Source Radiating to Open Space Based on the Superconducting Flux-Flow Oscillator: Development and Characterization

2019 ◽  
Vol 9 (6) ◽  
pp. 557-564 ◽  
Author(s):  
Nickolay V. Kinev ◽  
Kirill I. Rudakov ◽  
Lyudmila V. Filippenko ◽  
Andrey M. Baryshev ◽  
Valery P. Koshelets
Keyword(s):  
Open Space ◽  
Flux Flow ◽  
Terahertz Source

scholarly journals Система терагерцевой спектроскопии газовых смесей на основе твердотельных сверхпроводниковых источника и приемника терагерцевого диапазона

2021 ◽  
Vol 63 (9) ◽  
pp. 1204
Author(s):  
Н.В. Кинев ◽  
К.И. Рудаков ◽  
Л.В. Филиппенко ◽  
В.П. Кошелец
Keyword(s):  
Spectral Resolution ◽  
Open Space ◽  
Spectral Characteristics ◽  
Gas Mixture ◽  
Sis Receiver ◽  
Wide Range ◽  
A Cell ◽  
Transmitting Antenna ◽  
Josephson Oscillator ◽  
Better Than

In this paper, we demonstrate the application of a terahertz (THz) Josephson oscillator based on a tunnel superconductor-insulator-superconductor (SIS) long junction coupled to a transmitting antenna and emitting a signal to open space, for gas spectroscopy. The oscillator is utilized as an active source, the signal of which is absorbed by a gas mixture in a cell 60 cm long and then detected by a spectrometer based on a SIS receiver with a spectral resolution of better than 100 kHz. In the experiment, the absorption lines of ammonia and water in the THz range were recorded, and the dependence of the absorption spectral characteristics on the pressure of the gas mixture was shown in a wide range (from 0.005 to 10 mbar).

scholarly journals Terahertz Spectroscopy of Gas Absorption Using the Superconducting Flux-Flow Oscillator as an Active Source and the Superconducting Integrated Receiver

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7267
Author(s):  
Nickolay V. Kinev ◽  
Kirill I. Rudakov ◽  
Lyudmila V. Filippenko ◽  
Andrey M. Baryshev ◽  
Valery P. Koshelets
Keyword(s):  
Open Space ◽  
Terahertz Spectroscopy ◽  
Near Field ◽  
Gas Absorption ◽  
Thz Spectroscopy ◽  
Single Chip ◽  
Flux Flow ◽  
Practical Applications ◽  
Active Source ◽  
Integrated Receiver

We report on the first implementation of a terahertz (THz) source based on a Josephson flux-flow oscillator (FFO) that radiates to open space. The excellent performance of this source and its maturity for practical applications has been demonstrated by the spectroscopy of gas absorption. To study the radiated power, we used a bolometric detection method and additionally calibrated the power by means of pumping the superconductor–insulator–superconductor (SIS) junction, integrated on a single chip with the FFO. For calibration, we developed a program using the SIS-detected power calculations in accordance with the Tien and Gordon model. The power emitted to open space is estimated to be from fractions of µW to several µW in the wide region from 0.25 THz up to 0.75 THz for different designs, with a maximum power of 3.3 µW at 0.34 THz. Next, we used a gas cell and a heterodyne superconducting integrated receiver to trace the absorption lines of water and ammonia with a spectral resolution better than 100 kHz. Our experiment for gas absorption is the first demonstration of the applicability of the FFO as an external active source for different tasks, such as THz spectroscopy, near-field THz imaging and microscopy.

A Terahertz Source of Radiation to Open Space Based on a Long Josephson Junction

2020 ◽  
Vol 62 (9) ◽  
pp. 1543-1548
Author(s):  
N. V. Kinev ◽  
K. I. Rudakov ◽  
L. V. Filippenko ◽  
V. P. Koshelets ◽  
A. M. Baryshev
Keyword(s):  
Josephson Junction ◽  
Open Space ◽  
Terahertz Source

Flux-flow-type Josephson oscillator consisting of epitaxial NbCN/MgO/NbCN junction

1993 ◽  
Vol 3 (1) ◽  
pp. 2528-2531 ◽  
Author(s):  
S. Kiryu ◽  
S. Kohjiro ◽  
A. Shoji ◽  
S. Kodaira ◽  
J. Inatani ◽  
...  
Keyword(s):  
Flux Flow ◽  
Flow Type ◽  
Josephson Oscillator

Flux‐flow‐type Josephson oscillator for millimeter and submillimeter wave region. II. Modeling

1984 ◽  
Vol 56 (11) ◽  
pp. 3284-3293 ◽  
Author(s):  
T. Nagatsuma ◽  
K. Enpuku ◽  
K. Yoshida ◽  
F. Irie
Keyword(s):  
Submillimeter Wave ◽  
Flux Flow ◽  
Flow Type ◽  
Wave Region ◽  
Region Ii ◽  
Josephson Oscillator
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