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Publication Citation: A titanium-nitride near-infrared kinetic inductance photon-counting detector and its anomalous electrodynamics

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Author(s): Martin O. Sandberg; Fabio Cesar Da Silva; Kent D. Irwin; David P. Pappas; Sae Woo Nam; David Wisbey; Ben Mazin; Seth Meeker; Jonas Zmuidzinas; Henry G. Leduc;
Title: A titanium-nitride near-infrared kinetic inductance photon-counting detector and its anomalous electrodynamics
Published: October 01, 2012
Abstract: We demonstrate single-photon counting at 1550 nm with titanium-nitride (TiN) microwave kinetic inductancedetectors. Full-width-at-half-maximum energy resolution of 0.4 eV is achieved. 0-, 1-, 2- photon events are resolved and shown to follow Poisson statistics. We find that the temperature- dependent frequency shift deviates from the Mattis-Bardeen theory, and the dissipation response shows a shorter decay time than the frequency response at low temperatures. We suggest that the observed anomalous electrodynamics may be related to quasiparticle traps or subgap states in the disordered TiN films. Finally, the electron density-of-states is derived from the pulse response.
Citation: Applied Physics Letters
Volume: 101
Issue: 14
Pages: 4 pp.
Keywords: kinetic inductance detector; single photon detector; titanium nitride
Research Areas: Superconducting Electronics, Sensors, Single Photon Detectors
DOI: http://dx.doi.org/10.1063/1.4756916  (Note: May link to a non-U.S. Government webpage)
PDF version: PDF Document Click here to retrieve PDF version of paper (573KB)