On-demand generation of background-free single photons from a solid-state source
By L. Schweickert, K. Jons, Katharina D. Zeuner, S. C. D. Silva, Huiying Huang, Thomas Lettner, M. Reindl, J. Zichi, R. Trotta, A. Rastelli and 1 more. 2017
271 citations recorded by the source corpus.
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 suppres...
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/8d1ac4c532793552de30447520781e2dc857b974
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In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Compact Cavity-Enhanced Single-Photon Generation with Hexagonal Boron Nitride (2019, background): “A small error margin on correlation function measurements can typically be achieved with ultra-short pulsed excitation[48, 49].”
- Semiconductor quantum dots: Technological progress and future challenges (2021, background): “Over the years, the continuous improvement of In(Ga)As/GaAs eQD materials (151, 152) has led to the suppression of g((2))(t = 0) to less than 10 (153).”