Superconducting nanowire single photon detectors based on disordered NbRe films.

Authors :: Cirillo, C.
Chang, J.
Caputo, M.
Los, J. W. N.
Dorenbos, S.
Esmaeil Zadeh, I.
Attanasio, C.
Source :: Applied Physics Letters; 10/26/2020, Vol. 117 Issue 17, p1-5, 5p
Publication Year :: 2020
Abstract: Superconducting Nanowire Single Photon Detectors (SNSPDs) based on Nb<subscript>0.15</subscript>Re<subscript>0.85</subscript> disordered nanowires are developed. The devices have a meander structure of wires 50 – 100 nm wide and cover a circular detection area with a diameter of about 10–16 μm. The main figures of merit of the detectors are extracted from a flood illumination process at 2.8 K, featuring a saturated internal efficiency up to λ = 1301 nm, recovery times between about 8 and 19 ns, and a jitter of about 35 ps. These results confirm that Nb<subscript>0.15</subscript>Re<subscript>0.85</subscript> is a promising candidate for the realization of fast SNSPDs, as recently suggested. [ABSTRACT FROM AUTHOR]

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