Single photon detection up to 2 µm in pair of parallel microstrips based on NbRe ultrathin films
Year: 2024
Type: article
Abstract: Superconducting microstrip single photon detectors (SMSPDs) are increasingly attracting the interest of the scientific community as a new platform for large area detectors with unprecedented advantaged in terms of fabrication. However, while their operativity at the telecommunication wavelength was achieved, working beyond 1.55 µm is challenging. Here, we experimentally demonstrate single-photon operation of NbRe microstrips at wavelengths of 1.55 and 2 µm. The devices are structured as pairs of parallel microstrips with widths ranging from 1.4 to 2.2 μm and lengths from 5 to 10 μm. This innovative design may assure large sensitive areas, without affecting the kinetic inductance, namely the time performance of the detectors. The results are discussed in the framework of the hot-spot two-temperature model.
Source: Scientific Reports
Authors: C. Cirillo, M. Ejrnaes, P. Ercolano, C. Bruscino, A. Cassinese, D. Salvoni, C. Attanasio, G. P. Pepe, L. Parlato
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,590
Awards: G4408523876, G5829866654, G7999559658
OpenAlex ID: W4402146559