Development of lumped element kinetic inductance detectors for NIKA

M. Roesch, A. Benoi, A. Bideaud, N. Boudou, M. Calvo, A. Cruciani, S. Doyle, H. G. Leduc, A. Monfardini, L. Swenson, S. Leclercq, Philip Mauskopf, K. F. Schuster

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

9 Scopus citations


Lumped-element kinetic inductance detectors (LEKIDs) have recently shown considerable promise as directabsorption mm-wavelength detectors for astronomical applications. One major research thrust within the Néel Iram Kids Array (NIKA) collaboration has been to investigate the suitability of these detectors for deployment at the 30-meter IRAM telescope located on Pico Veleta in Spain. Compared to microwave kinetic inductance detectors (MKID), using quarter wavelength resonators, the resonant circuit of a LEKID consists of a discrete inductance and capacitance coupled to a feedline. A high and constant current density distribution in the inductive part of these resonators makes them very sensitive. Due to only one metal layer on a silicon substrate, the fabrication is relatively easy. In order to optimize the LEKIDs for this application, we have recently probed a wide variety of individual resonator and array parameters through simulation and physical testing. This included determining the optimal feed-line coupling, pixel geometry, resonator distribution within an array (in order to minimize pixel cross-talk), and resonator frequency spacing. Based on these results, a 144-pixel Aluminum array was fabricated and tested in a dilution fridge with optical access, yielding an average optical NEP of ~2 x 10-16 W/Hz?1/2 (best pixels showed NEP = 6 x 10-17 W/Hz?1/2 under 4-8 pW loading per pixel). In October 2010 the second prototype (NIKA2) of LEKIDs has been tested at the IRAM 30 m telescope. A new LEKID geometry for 2 polarizations will be presented. Also first optical measurements of a titanium nitride array will be discussed.

Original languageEnglish (US)
Title of host publication22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011
PublisherInternational Symposium on Space Terahertz Technology
Number of pages5
StatePublished - 2011
Externally publishedYes
Event22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011 - Tucson, AZ, United States
Duration: Apr 25 2011Apr 28 2011


Other22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011
Country/TerritoryUnited States
CityTucson, AZ


  • kinetic inductance
  • superconducting resonators

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Space and Planetary Science
  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Radiation


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