Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide We present superconducting nanowire photodetectors based on hBN-encapsulated, few-layer NbSe 2, showing signatures of single-photon sensitivity. The top-down fabrication process preserves the superconducting properties of NbSe 2, 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 T = 4 K. Meandered NbSe 2 nanowires exhibit high responsivity (up to 4.9 × 10 4 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% at 0.95 I c . A linear increase of the count rate with the number of photons between the noise level and the latching threshold offers a signature of single-photon sensitivity at 1100 nm.
Source: ACS Photonics
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Awards: G1068632926, Tunable Nanoengineered Transition Metal Dichalcogenides for Quantum Nanophotonics, G1768993395, G1957822890, G258225891, G2719947396, G3187620091, G4384538669, G4460664646, G5263747744, G5789606266, A Single-Photon Source Featuring Unity Efficiency And Unity Indistinguishability For Scalable Optical Quantum Information Processing, G7328051726
OpenAlex ID: W4413920400