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arXiv 1303.4546cond-mat.supr-con
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线宽对超导纳米线单光子探测器本征探测效率的影响

Effect of the wire width on the intrinsic detection efficiency of superconducting-nanowire single-photon detectors

R. Lusche, A. Semenov, H. -W. Huebers, K. Ilin, M. Siegel, Y. Korneeva, A. Trifonov, A. Korneev, G. Goltsman, D. Vodolazov

摘要:

对不同宽度的TaN和NbN超导纳米线的本征单光子探测效率进行了深入的光谱研究,结果表明,在近红外波段,探测效率的实验截止很可能是由于可用于电流传输的库珀对的局部缺陷造成的.对于这两种材料的倒数截止波长的规模与线的宽度,而缩放因子定量同意热点检测模型。与涡流辅助检测方案的实验数据的比较表明,这些模型预测的截止波长上的线宽的依赖性更强。

英文摘要:

Thorough spectral study of the intrinsic single-photon detection efficiency in superconducting TaN and NbN nanowires with different widths shows that the experimental cut-off in the efficiency at near-infrared wavelengths is most likely caused by the local deficiency of Cooper pairs available for current transport. For both materials the reciprocal cut-off wavelength scales with the wire width whereas the scaling factor quantitatively agrees with the hot-spot detection models. Comparison of the experimental data with vortex-assisted detection scenarios shows that these models predict a stronger dependence of the cut-off wavelength on the wire width.

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。

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