A flux-driven Josephson parametric amplifier for sub-GHz frequencies fabricated with side-wall passivated spacer junction technology

Research output: Contribution to journalArticleScientificpeer-review

Abstract

We present experimental results for a Josephson parametric amplifier tailored for readout of ultra-sensitive thermal microwave detectors. In particular, we discuss the impact of fabrication details on the performance. We show that the small volume of deposited dielectric materials enabled by the side-wall passivated spacer niobium junction technology leads to robust operation across a wide range of operating temperatures up to 1.5 K. The flux-pumped amplifier has gain in excess of 20 dB in three-wave mixing and its center frequency is tunable between 540-640 MHz. At 600 MHz, the amplifier adds 105 mK 9 mK of noise, as determined with the hot/cold source method. Phase-sensitive amplification is demonstrated with the device.

Original languageEnglish
Article number105001
JournalSuperconductor Science and Technology
Volume31
Issue number10
DOIs
Publication statusPublished - 24 Aug 2018
MoE publication typeNot Eligible

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Niobium
Parametric amplifiers
parametric amplifiers
spacers
Amplification
amplifiers
Microwaves
Fluxes
Detectors
Fabrication
operating temperature
niobium
readout
microwaves
Temperature
fabrication
detectors
Hot Temperature

Keywords

  • Josephson junction
  • parametric amplifier
  • SQUID array

Cite this

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title = "A flux-driven Josephson parametric amplifier for sub-GHz frequencies fabricated with side-wall passivated spacer junction technology",
abstract = "We present experimental results for a Josephson parametric amplifier tailored for readout of ultra-sensitive thermal microwave detectors. In particular, we discuss the impact of fabrication details on the performance. We show that the small volume of deposited dielectric materials enabled by the side-wall passivated spacer niobium junction technology leads to robust operation across a wide range of operating temperatures up to 1.5 K. The flux-pumped amplifier has gain in excess of 20 dB in three-wave mixing and its center frequency is tunable between 540-640 MHz. At 600 MHz, the amplifier adds 105 mK 9 mK of noise, as determined with the hot/cold source method. Phase-sensitive amplification is demonstrated with the device.",
keywords = "Josephson junction, parametric amplifier, SQUID array",
author = "Slawomir Simbierowicz and Visa Vesterinen and Leif Gr{\"o}nberg and Janne Lehtinen and Mika Prunnila and Juha Hassel",
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AU - Simbierowicz, Slawomir

AU - Vesterinen, Visa

AU - Grönberg, Leif

AU - Lehtinen, Janne

AU - Prunnila, Mika

AU - Hassel, Juha

PY - 2018/8/24

Y1 - 2018/8/24

N2 - We present experimental results for a Josephson parametric amplifier tailored for readout of ultra-sensitive thermal microwave detectors. In particular, we discuss the impact of fabrication details on the performance. We show that the small volume of deposited dielectric materials enabled by the side-wall passivated spacer niobium junction technology leads to robust operation across a wide range of operating temperatures up to 1.5 K. The flux-pumped amplifier has gain in excess of 20 dB in three-wave mixing and its center frequency is tunable between 540-640 MHz. At 600 MHz, the amplifier adds 105 mK 9 mK of noise, as determined with the hot/cold source method. Phase-sensitive amplification is demonstrated with the device.

AB - We present experimental results for a Josephson parametric amplifier tailored for readout of ultra-sensitive thermal microwave detectors. In particular, we discuss the impact of fabrication details on the performance. We show that the small volume of deposited dielectric materials enabled by the side-wall passivated spacer niobium junction technology leads to robust operation across a wide range of operating temperatures up to 1.5 K. The flux-pumped amplifier has gain in excess of 20 dB in three-wave mixing and its center frequency is tunable between 540-640 MHz. At 600 MHz, the amplifier adds 105 mK 9 mK of noise, as determined with the hot/cold source method. Phase-sensitive amplification is demonstrated with the device.

KW - Josephson junction

KW - parametric amplifier

KW - SQUID array

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