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Nb(x)Ti(1-x)N Superconducting-Nanowire Single-Photon DetectorsSuperconducting-nanowire single-photon detectors (SNSPDs) in which Nb(x)Ti(1-x)N (where x<1) films serve as the superconducting materials have shown promise as superior alternatives to previously developed SNSPDs in which NbN films serve as the superconducting materials. SNSPDs have potential utility in optical communications and quantum cryptography. Nb(x)Ti(1-x)N is a solid solution of NbN and TiN, and has many properties similar to those of NbN. It has been found to be generally easier to stabilize Nb(x)Ti(1-x)N in the high-superconducting-transition temperature phase than it is to so stabilize NbN. In addition, the resistivity and penetration depth of polycrystalline films of Nb(x)Ti(1-x)N have been found to be much smaller than those of films of NbN. These differences have been hypothesized to be attributable to better coupling at grain boundaries within Nb(x)Ti(1-x)N films.
Document ID
20090011269
Acquisition Source
Jet Propulsion Laboratory
Document Type
Other - NASA Tech Brief
Authors
Stern, Jeffrey A.
(California Inst. of Tech. Pasadena, CA, United States)
Farr, William H.
(California Inst. of Tech. Pasadena, CA, United States)
Leduc, Henry G.
(California Inst. of Tech. Pasadena, CA, United States)
Bumble, Bruce
(California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 24, 2013
Publication Date
July 1, 2008
Publication Information
Publication: NASA Tech Briefs, July 2008
Subject Category
Electronics And Electrical Engineering
Report/Patent Number
NPO-45603
Distribution Limits
Public
Copyright
Public Use Permitted.
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