Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Acta Physica Sinica

Millimeter wavelength coherent emission from high temperature superconducting bicrystal Josephson junction array

Yue Hong-Wei, Zheng Wang, Fan Bin, Fengbin Song, You Feng, Xinjie Zhao, He Ming, Fang Lan, Yan Shao-lin

Published Jan 1, 2010• 1 citation
Publisher

Abstract

The experimental results of mm-wave coherent emission from a high temperature superconducting bicrystal Josephson junction array embedded in a Fabry-Perot resonator are reported in this paper.The mm-wave coherent emission from the series junction array results from the interaction of the junctions with the substrate serving as the dielectric resonator as well as the Fabry-Perot resonator.The central frequency of emission of a Josephson junction array containing 166 bicrystal junctions was 75.84 GHz,and the detected emission power was about 10 pW at 77 K.

DOI
10.7498/aps.59.5755

Related papers

Millimeter-wavelength radiation from arrays of discrete high-temperature superconductor Josephson junctions

Fangfang Song, M. Levitchev, Vadim A. Markelov +3 more

Josephson junction arrays could be competitive candidates for radiation sources in the frequency range from 0.5 to 1.5 THz. This is the range where compact solid-state continuous wave sources are most lacking. We investigated the millimeter-wave radiation from arrays of high-temperature superconductor bicrystal Josephson junctions embedded in a quasi-optical resonator. The novel approach of utilizing the intrinsic resonance modes of the substrate to improve the impedance coupling between the series array of discrete Josephson junctions and the quasi-optical resonator was investigated by experiments and electromagnetic field simulations. Radiation from the arrays containing up to 536 junctions was detected at about 80 GHz and liquid nitrogen temperature using a low-noise receiver. The detected maximum radiation power of the arrays was about 50 pW and the peak voltage agreed exactly with the Josephson current–voltage relation.

Superconductor Science and Technology•Feb 22, 2010•5 citations

Arrays of high-Tc Josephson junctions in open millimeter wave resonators

Alexander M. Klushin, M. He, S.L. Yan +1 more

The authors have explored the coupling mechanism of a millimeter wave radiation to bicrystal Josephson junction arrays embedded in a hemispherical Fabry-Pérot resonator. The authors have found that their high-temperature superconductor array can be modeled as a thin film grid polarizer. In agreement with this model, a strong dependence of the coupling of the Josephson junctions on the polarization of the electric filed in the resonator was observed. The authors achieved a maximum Josephson voltage of 28mV for an array of 182 bicrystal junctions at a temperature of 75K and a frequency of 74.4GHz.

Applied Physics Letters•Dec 4, 2006•24 citations

Optimization of Bicrystal Josephson Junctions and Arrays in a Fabry-Perot Resonator

Mang He, Alexander M. Klushin, S.L. Yan +1 more

We report on the investigation of the coupling mechanism of a resonant millimeter wave electromagnetic field with bicrystal Josephson junction arrays embedded in a hemispherical Fabry-Perot resonator. We have found that our high-temperature superconductor array can be modeled as a thin film grid polarizer. In agreement with this model a strong dependence of the coupling of the Josephson junctions on the polarization of the electric field in the resonator was measured. Numerical field simulations confirm this model. According to this model, the dimension and interval of the grids and the dimension of the Josephson junctions are optimized by simulations and experiments. After optimized, a maximum Josephson voltage of 28 mV for an array of 182 bicrystal junctions at a temperature of 75 K and a frequency of 74.39 GHz was achieved for the first time. Our coupling method has a strong potential to be used up to terahertz frequencies.

IEEE Transactions on Applied Superconductivity•Jun 1, 2007•5 citations

Millimeter-wave self-radiation from high-Tc Josephson junction arrays

Kiejin Lee, Ienari Iguchi, Jeha Kim +2 more

We report the strong microwave Josephson radiation from an array of high-T/sub c/ junctions on a MgO bicrystal substrate from centimeter- to millimeter-wave ranges. The dc bias current was fed to the junction array having parallel geometry with the pair of junctions shunted by superconducting loops. The configuration of bias leads was a series of interlocking dc SQUID's geometry which guaranteed the oscillation of all junctions at the same frequency. The phase differences between adjacent junctions with different I/sub c/R/sub n/ products could be controlled by an external small magnetic field. For a five-junctions array, we observed the coherent output power of about 13 pW without external magnetic flux, which was nearly five times higher than that of a single bicrystal junction. We observed the Josephson linewidth of the self-radiation in the coherent state to be less than 1 GHz by adjustment of the external flux.

IEEE Transactions on Applied Superconductivity•Jun 1, 1997•6 citations

A method for self-radiation of Josephson junction arrays

Zh Wang, Xinjie Zhao, H W Yue +6 more

We proposed a novel approach to self-radiation of Josephson junction arrays. Bicrystal Josephson junction arrays fabricated on a bicrystal substrate were integrated with a half-wavelength dipole array and embedded in a Fabry–Perot resonator. Considered as a dielectric resonator, the substrate could be stimulated to resonate in an appropriate mode at the same frequency as the Fabry–Perot resonator, which realized a coupling between Josephson junctions as well as a coupling between the junctions and microwave structures by means of a resonant interaction between junctions and resonators. Both simulations and experiments were performed. A YBCO bicrystal Josephson junction array with 166 junctions was measured at liquid nitrogen temperature. The maximal self-radiation power of 10 pW was detected at 75.2 GHz, which was in agreement with the simulation results.

Superconductor Science and Technology•May 4, 2010•12 citations

Bicrystal Josephson junctions and arrays in a Fabry-Perot resonator

Alexander M. Klushin, D. M. Druzhnov, N. Klein

Full frequency locking of an array of 121 Josephson junctions was demonstrated upon millimeter wave irradiation employing a Fabry-Perot resonator at 73 GHz. This result indicates that such arrays exhibit promising properties to be utilized in quantum voltage metrology. On the other hand, the combination of such arrays with THz-Fabry Perot resonators is very challenging for developing Josephson array radiation sources for the THz frequency band.

Journal of Physics Conference Series•Jun 1, 2006•6 citations
The experimental results of mm-wave coherent emission from a high temperature superconducting bicrystal Josephson junction array embedded in a Fabry-Perot resonator are reported in this paper.The mm-wave coherent emission from the series junction array results from the interaction of the junctions with the substrate serving as the dielectric resonator as well as the Fabry-Perot resonator.The central frequency of emission of a Josephson junction array containing 166 bicrystal junctions was 75.84 GHz,and the detected emission power was about 10 pW at 77 K.
Josephson junction arrays could be competitive candidates for radiation sources in the frequency range from 0.5 to 1.5 THz. This is the range where compact solid-state continuous wave sources are most lacking. We investigated the millimeter-wave radiation from arrays of high-temperature superconductor bicrystal Josephson junctions embedded in a quasi-optical resonator. The novel approach of utilizing the intrinsic resonance modes of the substrate to improve the impedance coupling between the series array of discrete Josephson junctions and the quasi-optical resonator was investigated by experiments and electromagnetic field simulations. Radiation from the arrays containing up to 536 junctions was detected at about 80 GHz and liquid nitrogen temperature using a low-noise receiver. The detected maximum radiation power of the arrays was about 50 pW and the peak voltage agreed exactly with the Josephson current–voltage relation.
The authors have explored the coupling mechanism of a millimeter wave radiation to bicrystal Josephson junction arrays embedded in a hemispherical Fabry-Pérot resonator. The authors have found that their high-temperature superconductor array can be modeled as a thin film grid polarizer. In agreement with this model, a strong dependence of the coupling of the Josephson junctions on the polarization of the electric filed in the resonator was observed. The authors achieved a maximum Josephson voltage of 28mV for an array of 182 bicrystal junctions at a temperature of 75K and a frequency of 74.4GHz.
We report on the investigation of the coupling mechanism of a resonant millimeter wave electromagnetic field with bicrystal Josephson junction arrays embedded in a hemispherical Fabry-Perot resonator. We have found that our high-temperature superconductor array can be modeled as a thin film grid polarizer. In agreement with this model a strong dependence of the coupling of the Josephson junctions on the polarization of the electric field in the resonator was measured. Numerical field simulations confirm this model. According to this model, the dimension and interval of the grids and the dimension of the Josephson junctions are optimized by simulations and experiments. After optimized, a maximum Josephson voltage of 28 mV for an array of 182 bicrystal junctions at a temperature of 75 K and a frequency of 74.39 GHz was achieved for the first time. Our coupling method has a strong potential to be used up to terahertz frequencies.
We report the strong microwave Josephson radiation from an array of high-T/sub c/ junctions on a MgO bicrystal substrate from centimeter- to millimeter-wave ranges. The dc bias current was fed to the junction array having parallel geometry with the pair of junctions shunted by superconducting loops. The configuration of bias leads was a series of interlocking dc SQUID's geometry which guaranteed the oscillation of all junctions at the same frequency. The phase differences between adjacent junctions with different I/sub c/R/sub n/ products could be controlled by an external small magnetic field. For a five-junctions array, we observed the coherent output power of about 13 pW without external magnetic flux, which was nearly five times higher than that of a single bicrystal junction. We observed the Josephson linewidth of the self-radiation in the coherent state to be less than 1 GHz by adjustment of the external flux.
We proposed a novel approach to self-radiation of Josephson junction arrays. Bicrystal Josephson junction arrays fabricated on a bicrystal substrate were integrated with a half-wavelength dipole array and embedded in a Fabry–Perot resonator. Considered as a dielectric resonator, the substrate could be stimulated to resonate in an appropriate mode at the same frequency as the Fabry–Perot resonator, which realized a coupling between Josephson junctions as well as a coupling between the junctions and microwave structures by means of a resonant interaction between junctions and resonators. Both simulations and experiments were performed. A YBCO bicrystal Josephson junction array with 166 junctions was measured at liquid nitrogen temperature. The maximal self-radiation power of 10 pW was detected at 75.2 GHz, which was in agreement with the simulation results.