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

Published

Author(s)

Martin O. Sandberg, Fabio C. Da Silva, Kent D. Irwin, David P. Pappas, Sae Woo Nam, David Wisbey, Ben Mazin, Seth Meeker, Jonas Zmuidzinas, Henry G. Leduc

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

Keywords

kinetic inductance detector, single photon detector, titanium nitride
Created October 1, 2012, Updated November 10, 2018