A lumped element kinetic inductance device for detection of THz radiation

Simon Doyle, Phil Mauskopf, Chris Dunscombe, Adrian Porch, Jack Naylon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

Kinetic Inductance Detectors (KIDs) provide a promising solution to the problem of producing large format arrays of ultra sensitive detectors for astronomy. Traditionally KIDs have been constructed from superconducting quarter-wavelength or half-wavelength resonator elements capacitively coupled to a co-planar feed line [1]. Photons are detected by measuring the change in quasi-particle density caused by the splitting of Cooper pairs in the superconducting resonant element. This change in quasi-particle density alters the kinetic inductance, and hence the resonant frequency of the resonant element. This arrangement requires the quasi-particles generated by photon absorption to be concentrated at positions of high current density in the resonator. This is usually achieved through antenna coupling or quasi-particle trapping [2]. For these detectors to work at wavelengths shorter than around 500 μm where antenna coupling can introduce a significant loss of efficiency, then a direct absorption method needs to be considered [3]. One solution to this problem is the Lumped Element KID (LEKID), which shows no current variation along its length and can be arranged into a photon absorbing area coupled to free space and therefore requiring no antennas or quasi-particle trapping. This paper outlines the basic concept of the LEKID, along with theoretical performance and experimental data for these devices.

Original languageEnglish (US)
Title of host publicationIRMMW-THz2007 - Conference Digest of the Joint 32nd International Conference on Infrared and Millimetre Waves, and 15th International Conference on Terahertz Electronics
PublisherIEEE Computer Society
Pages450-451
Number of pages2
ISBN (Print)1424414385, 9781424414383
DOIs
StatePublished - 2007
Externally publishedYes
EventJoint 32nd International Conference on Infrared and Millimetre Waves, and 15th International Conference on Terahertz Electronics, IRMMW-THz2007 - Cardiff, United Kingdom
Duration: Sep 3 2007Sep 7 2007

Publication series

NameIRMMW-THz2007 - Conference Digest of the Joint 32nd International Conference on Infrared and Millimetre Waves, and 15th International Conference on Terahertz Electronics

Other

OtherJoint 32nd International Conference on Infrared and Millimetre Waves, and 15th International Conference on Terahertz Electronics, IRMMW-THz2007
CountryUnited Kingdom
CityCardiff
Period9/3/079/7/07

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

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