A titanium-nitride near-infrared kinetic inductance photon-counting detector and its anomalous electrodynamics
| Autor: | E. C. Langman, Martin Sandberg, Kent D. Irwin, Henry G. LeDuc, Jiansong Gao, Sae Woo Nam, F. C. S. da Silva, J. Zmuidzinas, Seth R. Meeker, David Wisbey, Ben Mazin, Michael R. Vissers, David P. Pappas |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Physics
Frequency response Physics and Astronomy (miscellaneous) Condensed Matter - Superconductivity chemistry.chemical_element FOS: Physical sciences Electron Dissipation Kinetic energy Photon counting Kinetic inductance Superconductivity (cond-mat.supr-con) chemistry Quantum electrodynamics Quasiparticle Tin Astrophysics - Instrumentation and Methods for Astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) Optics (physics.optics) Physics - Optics |
| 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. 4 pages, 3 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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