Characterizing superconducting filters using residual microwave background

J.S. Lehtinen (Corresponding Author), E. Mykkänen, A. Kemppinen, S. Lotkhov, D. Golubev, A. Manninen

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

A normal metal-superconductor hybrid single-electron trap with tunable barrier is utilized as a tool for spectrum analysis at the extremely low signal levels, using only well filtered cryogenic microwave background as a photon source in the frequency range from about 50 to 210 GHz. We probe millimeter wave propagation in two superconducting systems: a Josephson junction array around its plasma frequency, and a superconducting titanium film in the limit when the photon energies are larger than the superconducting energy gap. This regime is relevant for improving the performance of cryogenic quantum devices but is hard to access with conventional techniques. We show that relatively simple models can be used to describe the essential properties of the studied components.
Original languageEnglish
Article number055006
Number of pages10
JournalSuperconductor Science and Technology
Volume30
Issue number5
DOIs
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

Fingerprint

Cryogenics
cryogenics
Photons
Microwaves
filters
microwaves
Electron traps
photons
plasma frequencies
Titanium
Millimeter waves
Josephson junctions
Spectrum analysis
millimeter waves
Wave propagation
Superconducting materials
spectrum analysis
wave propagation
Energy gap
titanium

Keywords

  • superconductivity
  • microwave propagation
  • single-electron trap
  • microwave photon
  • detection
  • on-chip filters
  • josephson array

Cite this

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Characterizing superconducting filters using residual microwave background. / Lehtinen, J.S. (Corresponding Author); Mykkänen, E.; Kemppinen, A.; Lotkhov, S.; Golubev, D.; Manninen, A.

In: Superconductor Science and Technology, Vol. 30, No. 5, 055006, 2017.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Lehtinen, J.S.

AU - Mykkänen, E.

AU - Kemppinen, A.

AU - Lotkhov, S.

AU - Golubev, D.

AU - Manninen, A.

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KW - microwave propagation

KW - single-electron trap

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