Photon-assisted phase slips in superconducting nanowires

Biao Zhang; La Bao Zhang; Rui Ge; Qi Chen; Jiayu Lyu; Guanglong He; Haochen Li; Feiyan Li; Xiaohan Wang; Hao Wang; Xiaoqing Jia; Lin Kang; Peiheng Wu; Shunli Yu

doi:10.1117/12.2602530

15 October 2021 Photon-assisted phase slips in superconducting nanowires

Biao Zhang, La Bao Zhang, Rui Ge, Qi Chen, Jiayu Lyu, Guanglong He, Haochen Li, Feiyan Li, Xiaohan Wang, Hao Wang, Xiaoqing Jia, Lin Kang, Peiheng Wu, Shunli Yu

Author Affiliations +

Proceedings Volume 11894, Optoelectronic Devices and Integration X; 1189414 (2021) https://doi.org/10.1117/12.2602530
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Conference Poster

Abstract

The intrinsic mechanism of absorbing photons in superconductors reveals the interaction between photons and Cooper pairs, which is of great significance for developing new superconducting nanowire single photon detectors (SNSPDs). Here we propose a photon-assisted phase slip model to describe the interaction mechanism between photons and superconductors. In this model, incident photons destroy large quantities of Cooper pairs and reduce the free-energy barrier of the phase slip, resulting in proliferation in the phase slip events and leading to superconducting transition. The switching rates from the superconducting state of a niobium nitride nanowire under various photon irradiation and temperatures are calculated through the distribution of switching currents in the experiment. The experimental data can be well fitted by our deduced expression of phase slip rate after eliminating the influence of external noise.

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Biao Zhang, La Bao Zhang, Rui Ge, Qi Chen, Jiayu Lyu, Guanglong He, Haochen Li, Feiyan Li, Xiaohan Wang, Hao Wang, Xiaoqing Jia, Lin Kang, Peiheng Wu, and Shunli Yu "Photon-assisted phase slips in superconducting nanowires", Proc. SPIE 11894, Optoelectronic Devices and Integration X, 1189414 (15 October 2021); https://doi.org/10.1117/12.2602530

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