Toward single-photon detection with superconducting niobium diselenide nanowires
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arXiv
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| Autori principali: | , , , , , , , , , , , |
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| Natura: | Preprint |
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2025
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| author | Metuh, Pietro Paralikis, Athanasios Wyborski, Paweł Jamo, Sherwan Palermo, Alessandro Zugliani, Lucio Barbone, Matteo Müller, Kai Gregersen, Niels Vaitiekėnas, Saulius Finley, Jonathan Munkhbat, Battulga |
| author_facet | Metuh, Pietro Paralikis, Athanasios Wyborski, Paweł Jamo, Sherwan Palermo, Alessandro Zugliani, Lucio Barbone, Matteo Müller, Kai Gregersen, Niels Vaitiekėnas, Saulius Finley, Jonathan Munkhbat, Battulga |
| contents | We present superconducting nanowire single-photon detectors (SNSPDs) based on few-layer NbSe$_2$ fully encapsulated with hexagonal boron nitride (hBN), demonstrating single-photon sensitivity. Our fabrication process preserves the superconducting properties of NbSe$_2$ in nanowires, as confirmed by low-temperature transport measurements that show a critical temperature of $T_c \approx 6.5$ K, comparable to the reported values for unpatterned sheets, and it maintains a contact resistance of $\sim 50 \, Ω$ at $T = 4$ K. Meandered NbSe$_2$ nanowires exhibit a responsivity of up to $4.9 \times 10^4$ V/W over a spectral range of 650-1550 nm in a closed-cycle cryostat at 4 K, outperforming planar and short-wire devices. The devices achieve a $1/e$ recovery time of $τ= (135 \pm 36)$ ns, system timing jitter of $j_\text{sys} = (1103 \pm 7)$ ps, and detection efficiency of $\sim 0.01\%$ at $0.95I_c$, with a linear increase in detection probability confirming the single-photon operation. Furthermore, measurements under attenuated pulsed laser (1 MHz) indicate a success rate of up to $33\%$ in detecting individual optical pulses, establishing the platform as a promising candidate for developing efficient single-photon detectors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_22670 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Toward single-photon detection with superconducting niobium diselenide nanowires Metuh, Pietro Paralikis, Athanasios Wyborski, Paweł Jamo, Sherwan Palermo, Alessandro Zugliani, Lucio Barbone, Matteo Müller, Kai Gregersen, Niels Vaitiekėnas, Saulius Finley, Jonathan Munkhbat, Battulga Optics Materials Science Superconductivity We present superconducting nanowire single-photon detectors (SNSPDs) based on few-layer NbSe$_2$ fully encapsulated with hexagonal boron nitride (hBN), demonstrating single-photon sensitivity. Our fabrication process preserves the superconducting properties of NbSe$_2$ in nanowires, as confirmed by low-temperature transport measurements that show a critical temperature of $T_c \approx 6.5$ K, comparable to the reported values for unpatterned sheets, and it maintains a contact resistance of $\sim 50 \, Ω$ at $T = 4$ K. Meandered NbSe$_2$ nanowires exhibit a responsivity of up to $4.9 \times 10^4$ V/W over a spectral range of 650-1550 nm in a closed-cycle cryostat at 4 K, outperforming planar and short-wire devices. The devices achieve a $1/e$ recovery time of $τ= (135 \pm 36)$ ns, system timing jitter of $j_\text{sys} = (1103 \pm 7)$ ps, and detection efficiency of $\sim 0.01\%$ at $0.95I_c$, with a linear increase in detection probability confirming the single-photon operation. Furthermore, measurements under attenuated pulsed laser (1 MHz) indicate a success rate of up to $33\%$ in detecting individual optical pulses, establishing the platform as a promising candidate for developing efficient single-photon detectors. |
| title | Toward single-photon detection with superconducting niobium diselenide nanowires |
| topic | Optics Materials Science Superconductivity |
| url | https://arxiv.org/abs/2503.22670 |