Print Email Facebook Twitter Efficient Single-Photon Detection with 7.7 ps Time Resolution for Photon-Correlation Measurements Title Efficient Single-Photon Detection with 7.7 ps Time Resolution for Photon-Correlation Measurements Author Esmaeil Zadeh, I.Z. (TU Delft ImPhys/Optics; Single Quantum) Chang, J. (TU Delft ImPhys/Optics) Van Staaden, Yuri J. (Student TU Delft) Swens, Jeroen P.E. (Student TU Delft) Dobrovolskiy, S.M. (Single Quantum) Schaart, D.R. (TU Delft RST/Medical Physics & Technology) Pereira, S.F. (TU Delft ImPhys/Optics) Zwiller, Val (Single Quantum; KTH Royal Institute of Technology) Dorenbos, S.N. (Single Quantum) Date 2020 Abstract A broad range of scientific and industrial disciplines require precise optical measurements at very low light levels. Single-photon detectors combining high efficiency and high time resolution are pivotal in such experiments. By using relatively thick films of NbTiN (8-11 nm) and improving the pattern fidelity of the nanostructure of the superconducting nanowire single-photon detectors (SNSPD), we fabricated devices demonstrating superior performance over all previously reported detectors in the combination of efficiency and time resolution. Our findings prove that small variations in the nanowire width, in the order of a few nanometers, can lead to a significant penalty on their temporal response. Addressing these issues, we consistently achieved high time resolution (best device 7.7 ps, other devices a10-16 ps) simultaneously with high system detection efficiencies (80-90%) in the wavelength range of 780-1000 nm, as well as in the telecom bands (1310-1550 nm). The use of thicker films allowed us to fabricate large-area multipixel devices with homogeneous pixel performance. We first fabricated and characterized a 100 × 100 μm2 16-pixel detector and showed there was little variation among individual pixels. Additionally, to showcase the power of our platform, we fabricated and characterized 4-pixel multimode fiber-coupled detectors and carried out photon-correlation experiments on a nanowire quantum dot resulting in g2(0) values lower than 0.04. The multipixel detectors alleviate the need for beamsplitters and can be used for higher order correlations with promising prospects not only in the field of quantum optics, but also in bioimaging applications, such as fluorescence microscopy and positron emission tomography. Subject high time resolutionmultipixel detectorsphoton correlationquantum opticssuperconducting nanowire single-photon detector To reference this document use: http://resolver.tudelft.nl/uuid:0c9ca540-037c-4f20-93b0-6ced938a3278 DOI https://doi.org/10.1021/acsphotonics.0c00433 ISSN 2330-4022 Source ACS Photonics, 7 (7), 1780-1787 Part of collection Institutional Repository Document type journal article Rights © 2020 I.Z. Esmaeil Zadeh, J. Chang, Yuri J. Van Staaden, Jeroen P.E. Swens, S.M. Dobrovolskiy, D.R. Schaart, S.F. Pereira, Val Zwiller, S.N. Dorenbos, More Authors Files PDF acsphotonics.0c00433.pdf 4.97 MB Close viewer /islandora/object/uuid:0c9ca540-037c-4f20-93b0-6ced938a3278/datastream/OBJ/view