Spectral cut-off in the efficiency of the resistive state formation caused by absorption of a single-photon in current-carrying superconducting nano-strips

被引：140
作者：
Semenov, A
Engel, A
Hübers, HW
Il'in, K
Siegel, M
机构：
[1] DLR, Inst Planetary Res, D-12489 Berlin, Germany
[2] Univ Zurich, Inst Phys, Zurich, Switzerland
[3] Univ Karlsruhe, Inst Micro & Nano Elect Syst, D-76187 Karlsruhe, Germany
来源：
EUROPEAN PHYSICAL JOURNAL B | 2005年 / 47卷 / 04期
关键词：
Spectroscopy; Experimental Data; Neural Network; State Physics; Complex System;
D O I：
10.1140/epjb/e2005-00351-8
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We have studied supercurrent-assisted formation of the resistive state in nano-structured disordered superconducting Nb(N) films after absorption of a single optical to near-infrared photon. The efficiency of the resistive state formation has a pronounced spectral cut-off; corresponding threshold photon energy decreases with the bias current. Analysis of the experimental data in the framework of the refined hot-spot model suggests that the quantum yield for near-infrared photons increases with the photon energy. Relaxation of the resistive state depends on the photon energy making the phenomena feasible for the development of energy resolving single-photon detectors.
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页码：495 / 501
页数：7
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