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Title: High optical efficiency and photon noise limited sensitivity of microwave kinetic inductance detectors using phase readout

We demonstrate photon noise limited performance in both phase and amplitude readout in microwave kinetic inductance detectors (MKIDs) consisting of NbTiN and Al, down to 100 fW of optical power. We simulate the far field beam pattern of the lens-antenna system used to couple radiation into the MKID and derive an aperture efficiency of 75%. This is close to the theoretical maximum of 80% for a single-moded detector. The beam patterns are verified by a detailed analysis of the optical coupling within our measurement setup.
Authors:
;  [1] ;  [2] ; ;  [3] ;  [3] ;  [4] ;  [1] ;  [5]
  1. Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628CJ Delft (Netherlands)
  2. SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584CA Utrecht (Netherlands)
  3. SRON Netherlands Institute for Space Research, Landleven 12, 9747AD Groningen (Netherlands)
  4. (Netherlands)
  5. (Russian Federation)
Publication Date:
OSTI Identifier:
22254061
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 20; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLITUDES; ANTENNAS; APERTURES; BEAMS; EFFICIENCY; INDUCTANCE; MICROWAVE RADIATION; NOISE; PHOTONS; READOUT SYSTEMS; SENSITIVITY