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arXiv 1204.3548cond-mat.mes-hall
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超导体-普通金属电子阱混合光子探测器

A hybrid superconductor-normal metal electron trap as a photon detector

S. V. Lotkhov, A. B. Zorin

摘要:

在光子探测系统中,研究了由超导体(S)-绝缘体(I)-正常(N)金属隧道结构成的单电子陷阱,该陷阱耦合到读出SINIS型单电子晶体管A(SET A)。作为光子辐射源,我们使用了位于陷阱附近的第二个SINIS型SET B。在实验中,发现陷阱的平均保持时间与SET B两端的电压密切相关。在一定的电压范围内开始,观察到光子辅助电子逃逸的速率大致成正比的光子的能量超过S-电极的超导能隙的陷阱中的发射率。所讨论的光子发射和检测机制对于低温噪声光谱法是有意义的,并且对于基于混合SINIS旋转门的安培标准也是有意义的。

英文摘要:

A single-electron trap built with two Superconductor (S) - Insulator (I) - Normal (N) metal tunnel junctions and coupled to a readout SINIS-type single-electron transistor A (SET A) was studied in a photon detection regime. As a source of photon irradiation, we used an operating second SINIS-type SET B positioned in the vicinity of the trap. In the experiment, the average hold time of the trap was found to be critically dependent on the voltage across SET B. Starting in a certain voltage range, a photon-assisted electron escape was observed at a rate roughly proportional to the emission rate of the photons with energies exceeding the superconducting gap of S-electrodes in the trap. The discussed mechanism of photon emission and detection is of interest for low-temperature noise spectrometry and it can be of relevance for the ampere standard based on hybrid SINIS turnstiles.

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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