Transition-edge sensors using Mo/Au/Au tri-layer films

Wang, Hubing; Lv, Yue; Li, Dongxue; Zhao, Yue; Gao, Bo; Wang, Zhen

doi:10.1088/1674-1056/ac7f94

Cited by 2 publications

(1 citation statement)

References 23 publications

(22 reference statements)

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“…[5] TES fabrication process can be simplified by integrating the sensor patterning with the deposition of Mo/Au/Au trilayer films, and ∆E of 6.66 eV@5.9 keV is reported. [6] A 4 × 4 Mo/Cu TES array integrated with a 2.4-µm-thick bismuth absorber has been developed for the free-electron laser facility around ShanghaiTech University, which shows a quantum efficiency of 70% and ∆E of 5.2 eV at 5.9 keV. [7] In addition, the data acquisition and processing are also crucial for obtaining better ∆E.…”

Section: Introductionmentioning

confidence: 99%

Improvement of energy resolution of x-ray transition-edge sensor using K-means algorithm and Wiener filter

Zhang

et al. 2023

Chinese Phys. B

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We have developed an X-ray Ti/Au transition-edge sensor (TES) with an Au absorber deposited on the center of TES and improved its energy resolution using K-means clustering algorithm in combination with Wiener filter. We firstly extract the main parameters of each recorded pulse trace, which are adopted to classify these traces into several clusters in K-Means clustering algorithm. Then real traces are selected for energy resolution analysis. Following the baseline correction, the Wiener filterer is used to improve the signal-to-noise ratio. Although the silicon underneath the TES has not been etched to reduce the thermal conductance, the energy resolution of the developed X-ray TES was improved from 94 eV to 44 eV@5.9 keV.

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Section: Introductionmentioning

confidence: 99%

Improvement of energy resolution of x-ray transition-edge sensor using K-means algorithm and Wiener filter

Zhang

et al. 2023

Chinese Phys. B

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Enhancing SNSPDs detection efficiency via suspended SiO2 membrane

Xu,

Bao,

Qin

et al. 2023

Applied Physics Letters

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Superconducting nanowire single-photon detectors (SNSPDs) with high detection efficiency have played significant role in numerous applications for photon detection from visible light to mid-infrared band. However, it is still a challenge to easily promote the sensitivity of SNSPD without compromising its other performance. We report a method to improve the detection sensitivity of devices via suspended SiO2 membrane, and the intrinsic detection efficiency is significantly enhanced from 78% to 100% for a 1550 nm wavelength. The electro-thermal simulation and hotspot relaxation time measurement indicate that a suspended SiO2 membrane can significantly decrease the cooling efficiency between the hotspot and the substrate, and the relaxation time is enlarged twice than before. Meanwhile, we note that the proposed method does not affect other properties of devices, such as dark count rate, detection speed, and timing jitter. Because the thermal dissipation process can be controlled continuously (by varying the size of the suspended area), the proposed method may also help to obtain a deeper understanding of the thermal diffusion and detection process of SNSPDs.

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Transition-edge sensors using Mo/Au/Au tri-layer films

Cited by 2 publications

References 23 publications

Improvement of energy resolution of x-ray transition-edge sensor using K-means algorithm and Wiener filter

Improvement of energy resolution of x-ray transition-edge sensor using K-means algorithm and Wiener filter

Enhancing SNSPDs detection efficiency via suspended SiO2 membrane

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