Print Email Facebook Twitter On-demand generation of background-free single photons from a solid-state source Title On-demand generation of background-free single photons from a solid-state source Author Schweickert, L.S. (AlbaNova University Center) Jöns, K.D. (AlbaNova University Center) Zeuner, K.D. (AlbaNova University Center) Covre Da Silva, Saimon Filipe (Johannes Kepler University Linz) Huang, Huiying (Johannes Kepler University Linz) Lettner, Thomas (AlbaNova University Center) Reindl, Marcus (Johannes Kepler University Linz) Zichi, J.R. (AlbaNova University Center) Trotta, Rinaldo (Johannes Kepler University Linz; Sapienza University of Rome) Rastelli, Armando (Johannes Kepler University Linz) Zwiller, V.G. (TU Delft QN/Zwiller Lab; AlbaNova University Center; Kavli institute of nanoscience Delft) Date 2018 Abstract True on-demand high-repetition-rate single-photon sources are highly sought after for quantum information processing applications. However, any coherently driven two-level quantum system suffers from a finite re-excitation probability under pulsed excitation, causing undesirable multi-photon emission. Here, we present a solid-state source of on-demand single photons yielding a raw second-order coherence of g(2)(0)=(7.5±1.6)×10-5 without any background subtraction or data processing. To this date, this is the lowest value of g(2)(0) reported for any single-photon source even compared to the previously reported best background subtracted values. We achieve this result on GaAs/AlGaAs quantum dots embedded in a low-Q planar cavity by employing (i) a two-photon excitation process and (ii) a filtering and detection setup featuring two superconducting single-photon detectors with ultralow dark-count rates of (0.0056±0.0007) s-1 and (0.017±0.001) s-1, respectively. Re-excitation processes are dramatically suppressed by (i), while (ii) removes false coincidences resulting in a negligibly low noise floor. To reference this document use: http://resolver.tudelft.nl/uuid:1e70b86e-fb16-46f0-b23c-69709cc257de DOI https://doi.org/10.1063/1.5020038 ISSN 0003-6951 Source Applied Physics Letters, 112 (9) Part of collection Institutional Repository Document type journal article Rights © 2018 L.S. Schweickert, K.D. Jöns, K.D. Zeuner, Saimon Filipe Covre Da Silva, Huiying Huang, Thomas Lettner, Marcus Reindl, J.R. Zichi, Rinaldo Trotta, Armando Rastelli, V.G. Zwiller Files PDF 1.5020038.pdf 825.11 KB Close viewer /islandora/object/uuid:1e70b86e-fb16-46f0-b23c-69709cc257de/datastream/OBJ/view