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Proceedings Paper

Performance of hybrid NbTiN-Al microwave kinetic inductance detectors as direct detectors for sub-millimeter astronomy
Author(s): R. M. J. Janssen; J. J. A. Baselmans; A. Endo; L. Ferrari; S. J. C. Yates; A. M. Baryshev; T. M. Klapwijk
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Paper Abstract

In the next decades millimeter and sub-mm astronomy requires large format imaging arrays and broad-band spectrometers to complement the high spatial and spectral resolution of the Atacama Large Millimeter/submillimeter Array. The desired sensors for these instruments should have a background limited sensitivity and a high optical efficiency and enable arrays thousands of pixels in size. Hybrid microwave kinetic inductance detectors consisting of NbTiN and Al have shown to satisfy these requirements. We present the second generation hybrid NbTiN-Al MKIDs, which are photon noise limited in both phase and amplitude readout for loading levels P850GHz < 10 fW. Thanks to the increased responsivity, the photon noise level achieved in phase allows us to simultaneously read out approximately 8000 pixels using state-of-the-art electronics. In addition, the choice of superconducting materials and the use of a Si lens in combination with a planar antenna gives these resonators the flexibility to operate within the frequency range 0:09 < v < 1:1 THz. Given these specifications, hybrid NbTiN-Al MKIDs will enable astronomically usable kilopixel arrays for sub-mm imaging and moderate resolution spectroscopy.

Paper Details

Date Published: 23 July 2014
PDF: 7 pages
Proc. SPIE 9153, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII, 91530T (23 July 2014); doi: 10.1117/12.2055537
Show Author Affiliations
R. M. J. Janssen, Technische Univ. Delft (Netherlands)
J. J. A. Baselmans, SRON Netherlands Institute for Space Research (Netherlands)
A. Endo, Technische Univ. Delft (Netherlands)
L. Ferrari, SRON Netherlands Institute for Space Research (Netherlands)
S. J. C. Yates, SRON Netherlands Institute for Space Research (Netherlands)
A. M. Baryshev, SRON Netherlands Institute for Space Research (Netherlands)
Kapteyn Astronomical Institute, Univ. of Groningen (Netherlands)
T. M. Klapwijk, Technische Univ. Delft (Netherlands)
Moscow State Pedagogical Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 9153:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII
Wayne S. Holland; Jonas Zmuidzinas, Editor(s)

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