Print Email Facebook Twitter High-performance photon number resolving detectors for 850-950 nm wavelength range Title High-performance photon number resolving detectors for 850-950 nm wavelength range Author Los, J. W.Niels (Single Quantum) Sidorova, Mariia (Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR); Nanyang Technological University) Lopez Rodriguez, B. (TU Delft ImPhys/Esmaeil Zadeh group) Qualm, H.P. (TU Delft ImPhys/Imaging Physics) Chang, J. (TU Delft QN/Groeblacher Lab; TU Delft QN/Quantum Nanoscience; Kavli institute of nanoscience Delft) Steinhauer, Stephan (KTH Royal Institute of Technology) Zwiller, Val (KTH Royal Institute of Technology) Esmaeil Zadeh, I.Z. (TU Delft ImPhys/Esmaeil Zadeh group; Single Quantum) Department ImPhys/Imaging Physics Date 2024 Abstract Since their first demonstration in 2001 [Gol’tsman et al., Appl. Phys. Lett. 79, 705-707 (2001)], superconducting-nanowire single-photon detectors (SNSPDs) have witnessed two decades of great developments. SNSPDs are the detector of choice in most modern quantum optics experiments and are slowly finding their way into other photon-starved fields of optics. Until now, however, in nearly all experiments, SNSPDs were used as “binary” detectors, meaning that they could only distinguish between 0 and > = 1 photons, and photon number information was lost. Recent research has demonstrated proof-of-principle photon-number resolution (PNR) SNSPDs counting 2-5 photons. The photon-number-resolving capability is highly demanded in various quantum-optics experiments, including Hong-Ou-Mandel interference, photonic quantum computing, quantum communication, and non-Gaussian quantum state preparation. In particular, PNR detectors at the wavelength range of 850-950 nm are of great interest due to the availability of high-quality semiconductor quantum dots (QDs) [Heindel et al., Adv. Opt. Photonics 15, 613-738 (2023)] and high-performance cesium-based quantum memories [Ma et al., J. Opt. 19, 043001 (2017)]. In this paper, we demonstrate NbTiN-based SNSPDs with >94% system detection efficiency, sub-11 ps timing jitter for one photon, and sub-7 ps for 2 photons. More importantly, our detectors resolve up to 7 photons using conventional cryogenic electric readout circuitry. Through theoretical analysis, we show that the PNR performance of demonstrated detectors can be further improved by enhancing the signal-to-noise ratio and bandwidth of our readout circuitry. Our results are promising for the future of optical quantum computing and quantum communication. To reference this document use: http://resolver.tudelft.nl/uuid:cc2d41e7-259d-4e37-a811-62925db5ccc1 DOI https://doi.org/10.1063/5.0204340 ISSN 2378-0967 Source APL Photonics, 9 (6) Part of collection Institutional Repository Document type journal article Rights © 2024 J. W.Niels Los, Mariia Sidorova, B. Lopez Rodriguez, H.P. Qualm, J. Chang, Stephan Steinhauer, Val Zwiller, I.Z. Esmaeil Zadeh Files PDF 066101_1_5.0204340.pdf 6.89 MB Close viewer /islandora/object/uuid:cc2d41e7-259d-4e37-a811-62925db5ccc1/datastream/OBJ/view