biostudies-literatureMetuh PEuropean Research Council5912-5920https://www.ebi.ac.uk/biostudies/studies/S-EPMC12636084biostudies-literatureUnknown12(11)We present superconducting nanowire photodetectors based on hBN-encapsulated, few-layer NbSe₂, showing signatures of single-photon sensitivity. The top-down fabrication process preserves the superconducting properties of NbSe₂, as confirmed by low-temperature transport measurements showing comparable results to unpatterned sheets, and it maintains a contact and wiring resistance down to ∼30 Ω at <i>T</i> = 4 K. Meandered NbSe₂ nanowires exhibit high responsivity (up to 4.9 × 10⁴ V/W) over a spectral range of 650-1550 nm in a closed-cycle cryostat at 4 K, outperforming samples with different geometries in this work. The meander achieves a recovery time of (135 ± 36) ns, a system timing jitter of (1103 ± 7) ps, and a detection efficiency of ∼0.01% ACS photonicsToward Single-Photon Detection with Superconducting Niobium Diselenide Nanowires.PMC12636084101076437865230Muller KMunkhbat BParalikis APalermo ABarbone MZugliani LVaitiekenas SFinley JJamo SGregersen NMetuh PWyborski PfalseToward Single-Photon Detection with Superconducting Niobium Diselenide Nanowires.We present superconducting nanowire photodetectors based on hBN-encapsulated, few-layer NbSe₂, showing signatures of single-photon sensitivity. The top-down fabrication process preserves the superconducting properties of NbSe₂, as confirmed by low-temperature transport measurements showing comparable results to unpatterned sheets, and it maintains a contact and wiring resistance down to ∼30 Ω at <i>T</i> = 4 K. Meandered NbSe₂ nanowires exhibit high responsivity (up to 4.9 × 10⁴ V/W) over a spectral range of 650-1550 nm in a closed-cycle cryostat at 4 K, outperforming samples with different geometries in this work. The meander achieves a recovery time of (135 ± 36) ns, a system timing jitter of (1103 ± 7) ps, and a detection efficiency of ∼0.01% 2025-01-01T00:00:00Z2025 Nov2026-06-06T06:43:10.133Z2026-06-06T03:06:37.471ZS-EPMC126360844128301310.1021/acsphotonics.5c01195