Single photon detection up to 2 µm in pair of parallel microstrips based on NbRe ultrathin films
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.
Authors
- C. Cirillo (ORCID: https://orcid.org/0000-0001-8755-4484)
- Ciro Bruscino (ORCID: https://orcid.org/0000-0002-1472-6617)
- A. Cassinese (ORCID: https://orcid.org/0000-0002-5866-223X)
- Pasquale Ercolano (ORCID: https://orcid.org/0000-0002-2689-6074)
- C. Attanasio
- Daniela Salvoni (ORCID: https://orcid.org/0000-0002-7393-7318)
- L. Parlato (ORCID: https://orcid.org/0000-0002-1646-3435)
- Guglielmina Pepe (ORCID: https://orcid.org/0000-0001-9825-6618)
- M. Ejrnæs (ORCID: https://orcid.org/0000-0002-7461-9143)
Institutions
- University of Salerno (IT)
- Superconducting and other Innovative Materials and Devices Institute (IT)
- Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (IT)
- University of Naples Federico II (IT)
Publication Details
- Journal
- Scientific Reports
- Published
- 2024-09-02
- DOI
- https://doi.org/10.1038/s41598-024-66991-1
- Citations
- 6
- Primary Topic
- Atomic and Subatomic Physics Research
- Type
- article
- Field-Weighted Citation Impact
- 2.03
Funders
- Ministero dell'Università e della Ricerca