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

Novel waveguide heterodyne mixers with superconducting tunnel junctions at millimeter wavelengths for astronomical and atmospheric applications

浅山信一郎

Published Jan 1, 2004• 0 citations
OpenAlex

Related papers

The use of a Josephson junction as a heterodyne-mixer at millimeter wavelengths

A. I. Akimenko, I. K. Ianson, В. С. Соловьев

•May 1, 1975•0 citations

Conversion in a superconducting-tunnel-junction mixer at harmonics of the heterodyne frequency

V. I. Belitsky, Alexander N. Vystavkin, I. L. Serpuchenko +1 more

Radiotekhnika i Elektronika•Jan 1, 1990•0 citations

Superconducting detectors for infrared and millimeter waves

Paul L. Richards

Quasiparticle and Josephson tunneling currents in superconducting tunnel junctions provide nonlinear low-noise response up to terahertz frequencies. Many types of direct detector heterodyne mixer and parametric amplifier based on these effects have been explored. Only the SIS quasiparticle mixer has been sufficiently competitive to find significant applications. These mixers can have noise approaching the quantum limit TN = ℏω/k and gain larger than 10 dB. They are used at a number of observatories for molecular line radio astronomy at millimeter wavelengths. Similar applications at submillimeter wavelengths are beginning.

Conference on Lasers and Electro-Optics•Apr 25, 1988•0 citations

QUANTUM-LIMITED BROADBAND MIXERS WITH SUPERCONDUCTING TUNNEL JUNCTIONS AT MILLIMETER AND SUBMILLIMETER WAVELENGTHS

史生才

•Jan 1, 1996•3 citations

QUANTUM-LIMITED BROADBAND MIXERS WITH SUPERCONDUCTING TUNNEL JUNCTIONS AT MILLIMETER AND SUBMILLIMETER WAVELENGTHS

史生才, セイサイ シ, Zhenfeng XI

•Sep 30, 1996•0 citations

0.5-THz waveguide SIS mixers with NbN/AlN/NbN technology - art. no. 684013

Jing Li, Takeda Masanon, Zhen Wang

Heterodyne mixers based on superconducting SIS (superconductor-insulator-superconductor) tunnel junctions have been demonstrated to be the most sensitive coherent detectors at millimeter and submillimeter wavelengths. In fact, conventional superconducting SIS mixers with Nb/AIO(x)/Nb junction and Nb/SiO2/Nb tuning circuit have shown good performances with the noise temperature reaching as low as three times the quantum limit below 0.7THz, which is the gap frequency of Nb-based SIS junctions. However, due to the large loss in Nb thin-film superconducting microstrip lines, the noise performance of Nb SIS mixers deteriorates significantly above 0.7THz. With a gap frequency double that of Nb-based SIS junctions, NbN-based SIS junctions are of particular interest for the development of heterodyne mixers in the terahertz region.

•Jan 1, 2008•0 citations
Quasiparticle and Josephson tunneling currents in superconducting tunnel junctions provide nonlinear low-noise response up to terahertz frequencies. Many types of direct detector heterodyne mixer and parametric amplifier based on these effects have been explored. Only the SIS quasiparticle mixer has been sufficiently competitive to find significant applications. These mixers can have noise approaching the quantum limit TN = ℏω/k and gain larger than 10 dB. They are used at a number of observatories for molecular line radio astronomy at millimeter wavelengths. Similar applications at submillimeter wavelengths are beginning.
Heterodyne mixers based on superconducting SIS (superconductor-insulator-superconductor) tunnel junctions have been demonstrated to be the most sensitive coherent detectors at millimeter and submillimeter wavelengths. In fact, conventional superconducting SIS mixers with Nb/AIO(x)/Nb junction and Nb/SiO2/Nb tuning circuit have shown good performances with the noise temperature reaching as low as three times the quantum limit below 0.7THz, which is the gap frequency of Nb-based SIS junctions. However, due to the large loss in Nb thin-film superconducting microstrip lines, the noise performance of Nb SIS mixers deteriorates significantly above 0.7THz. With a gap frequency double that of Nb-based SIS junctions, NbN-based SIS junctions are of particular interest for the development of heterodyne mixers in the terahertz region.