Ultrasensitive proximity Josephson sensor with kinetic inductance readout

F. Giazotto; T. T. Heikkilä; G. P. Pepe; Panu Helistö; A. Luukanen; J. P. Pekola

doi:10.1063/1.2908922

Ultrasensitive proximity Josephson sensor with kinetic inductance readout

F. Giazotto (Corresponding Author), T. T. Heikkilä, G. P. Pepe, Panu Helistö, A. Luukanen, J. P. Pekola

Research output: Contribution to journal › Article › Scientific › peer-review

58 Citations (Scopus)

Abstract

We propose a mesoscopic kinetic-inductance radiation detector based on a long superconductor-normal metal-superconductor Josephson junction. The operation of this proximity Josephson sensor relies on large kinetic inductance variations under irradiation due to the exponential temperature dependence of the critical current. Coupled with a dc superconducting quantum interference device readout, the PJS is able to provide a signal to noise (S/N) ratio up to ∼10³ in the terahertz regime if operated as calorimeter, while electrical noise equivalent power as low as ∼7×10⁻²⁰W/√Hz at 200 mK can be achieved in the bolometer operation. The high performance together with the ease of fabrication make this structure attractive as an ultrasensitive cryogenic detector of terahertz electromagnetic radiation.

Original language	English
Article number	162507
Journal	Applied Physics Letters
Volume	92
Issue number	16
DOIs	https://doi.org/10.1063/1.2908922
Publication status	Published - 2008
MoE publication type	A1 Journal article-refereed

Keywords

critical currents
Josephson effect
radiation detection
SQUIDs
superconductor-normal-superconductor devices

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10.1063/1.2908922

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title = "Ultrasensitive proximity Josephson sensor with kinetic inductance readout",

abstract = "We propose a mesoscopic kinetic-inductance radiation detector based on a long superconductor-normal metal-superconductor Josephson junction. The operation of this proximity Josephson sensor relies on large kinetic inductance variations under irradiation due to the exponential temperature dependence of the critical current. Coupled with a dc superconducting quantum interference device readout, the PJS is able to provide a signal to noise (S/N) ratio up to ∼103 in the terahertz regime if operated as calorimeter, while electrical noise equivalent power as low as ∼7×10−20W/√Hz at 200 mK can be achieved in the bolometer operation. The high performance together with the ease of fabrication make this structure attractive as an ultrasensitive cryogenic detector of terahertz electromagnetic radiation.",

keywords = "critical currents, Josephson effect, radiation detection, SQUIDs, superconductor-normal-superconductor devices",

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year = "2008",

doi = "10.1063/1.2908922",

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T1 - Ultrasensitive proximity Josephson sensor with kinetic inductance readout

AU - Giazotto, F.

AU - Heikkilä, T. T.

AU - Pepe, G. P.

AU - Helistö, Panu

AU - Luukanen, A.

AU - Pekola, J. P.

PY - 2008

Y1 - 2008

N2 - We propose a mesoscopic kinetic-inductance radiation detector based on a long superconductor-normal metal-superconductor Josephson junction. The operation of this proximity Josephson sensor relies on large kinetic inductance variations under irradiation due to the exponential temperature dependence of the critical current. Coupled with a dc superconducting quantum interference device readout, the PJS is able to provide a signal to noise (S/N) ratio up to ∼103 in the terahertz regime if operated as calorimeter, while electrical noise equivalent power as low as ∼7×10−20W/√Hz at 200 mK can be achieved in the bolometer operation. The high performance together with the ease of fabrication make this structure attractive as an ultrasensitive cryogenic detector of terahertz electromagnetic radiation.

AB - We propose a mesoscopic kinetic-inductance radiation detector based on a long superconductor-normal metal-superconductor Josephson junction. The operation of this proximity Josephson sensor relies on large kinetic inductance variations under irradiation due to the exponential temperature dependence of the critical current. Coupled with a dc superconducting quantum interference device readout, the PJS is able to provide a signal to noise (S/N) ratio up to ∼103 in the terahertz regime if operated as calorimeter, while electrical noise equivalent power as low as ∼7×10−20W/√Hz at 200 mK can be achieved in the bolometer operation. The high performance together with the ease of fabrication make this structure attractive as an ultrasensitive cryogenic detector of terahertz electromagnetic radiation.

KW - critical currents

KW - Josephson effect

KW - radiation detection

KW - SQUIDs

KW - superconductor-normal-superconductor devices

U2 - 10.1063/1.2908922

DO - 10.1063/1.2908922

M3 - Article

SN - 0003-6951

VL - 92

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 16

M1 - 162507

ER -

Ultrasensitive proximity Josephson sensor with kinetic inductance readout

Abstract

Keywords

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