arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1208.0871cond-mat.supr-conastro-ph.IMphysics.optics
收藏

氮化钛近红外动力学电感光子计数探测器及其反常电动力学

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

J. Gao, M. R. Visser, M. O. Sandberg, F. C. S. da Silva, S. W. Nam, D. P. Pappas, K. D. Irwin, D. S. Wisbey, E. Langman, S. R. Meeker, B. A. Mazin, H. G. Leduc, J. Zmuidzinas

摘要:

我们演示了单光子计数在1550 nm的氮化钛(TiN)微波动力学电感探测器。能量分辨率为0.4 eV,到达时间分辨率为1.2微秒。0-,1-,2-光子事件的解决,并遵循泊松统计。我们发现,随温度变化的频率偏移偏离Mattis-Barclay理论,并且耗散响应在低温下表现出比频率响应更短的衰减时间。我们认为观察到的异常电动力学可能与无序TiN薄膜中的准粒子陷阱或亚能隙态有关。最后,从脉冲响应导出电子态密度。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑