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Superconducting Films for Absorber-Coupled MKID Detectors for Sub-Millimeter and Far-Infrared Astronomy

Stevenson, Thomas R. and Adams, Joseph S. and Hsieh, Wen-Ting and Moseley, Samuel Harvey and Travers, Douglas E. and U-yen, Kongpop and Wollack, Edward J. and Zmuidzinas, Jonas (2009) Superconducting Films for Absorber-Coupled MKID Detectors for Sub-Millimeter and Far-Infrared Astronomy. IEEE Transactions on Applied Superconductivity, 19 (3). pp. 561-564. ISSN 1051-8223.

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We describe measurements of the properties, at dc, gigahertz, and terahertz frequencies, of thin (10 nm) aluminum films with 10 ohm/{rm square}$ normal state sheet resistance. Such films can be applied to construct microwave kinetic inductance detector arrays for submillimeter and far-infrared astronomical applications in which incident power excites quasiparticles directly in a superconducting resonator that is configured to present a matched-impedance to the high frequency radiation being detected. For films 10 nm thick, we report normal state sheet resistance, resistance-temperature curves for the superconducting transition, quality factor and kinetic inductance fraction for microwave resonators made from patterned films, and terahertz measurements of sheet impedance measured with a Fourier Transform Spectrometer. We compare properties with similar resonators made from niobium 600 nm thick.

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Wollack, Edward J.0000-0002-7567-4451
Additional Information:© 2009 IEEE. Manuscript received August 16, 2008. First published June 16, 2009; current version published July 10, 2009. This work was supported in part by an award under NASA’s ROSES-APRA program. The authors thank Ross Henry for FTS measurements of the aluminum films, and Christine Jhabvala and Mary Li for fabrication of the niobium resonators.
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Subject Keywords:Aluminum, inductance, microwave measurements, niobium, Q factor, superconducting resonators
Issue or Number:3
Record Number:CaltechAUTHORS:20090808-142502351
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14892
Deposited By: George Porter
Deposited On:01 Sep 2009 23:07
Last Modified:09 Mar 2020 13:19

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