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

Autor:	Gao, J., Visser, M. R., Sandberg, M. O., da Silva, F. C. S., Nam, S. W., Pappas, D. P., Irwin, K. D., Wisbey, D. S., Langman, E., Meeker, S. R., Mazin, B. A., Leduc, H. G., Zmuidzinas, J.
Rok vydání:	2012
Předmět:	Condensed Matter - Superconductivity Astrophysics - Instrumentation and Methods for Astrophysics Physics - Optics
Druh dokumentu:	Working Paper
DOI:	10.1063/1.4756916
Popis:	We demonstrate single-photon counting at 1550 nm with titanium-nitride (TiN) microwave kinetic inductance detectors. Energy resolution of 0.4 eV and arrival-time resolution of 1.2 microseconds are 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. Comment: 4 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1208.0871 Zobrazit plný text záznamu View this record from Arxiv