Nonlinear down-conversion in a single quantum dot

B. Jonas, D. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, K.D. Jöns, D. Reuter, S. Schumacher, A. Zrenner, ArXiv:2105.12393 (2021).

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Abstract
Photonic quantum technologies [1] with applications in quantum communication, sensing as well as quantum simulation and computing, are on the verge of becoming commercially available. One crucial building block are tailored nanoscale integratable quantum light sources, matching the specific needs of use-cases. Several different approaches to realize solid-state quantum emitters [2] with high performance [3] have been pursued. However, the properties of the emitted single photons are always defined by the individual quantum light source and despite numerous quantum emitter tuning techniques [4-7], scalability is still a major challenge. Here we show an emitter-independent method to tailor and control the properties of the single photon emission. We demonstrate a laser-controlled down-conversion process from an excited state of a quantum three-level system [8]. Starting from a biexciton state, a tunable control laser field defines a virtual state in a stimulated process. From there, spontaneous emission to the ground state leads to optically controlled single photon emission. Based on this concept, we demonstrate energy tuning of the single photon emission with a control laser field. The nature of the involved quantum states furthermore provides a unique basis for the future control of polarization and bandwidth, as predicted by theory [9,10]. Our demonstration marks an important step towards tailored single photon emission from a photonic quantum system based on quantum optical principles.
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arXiv:2105.12393
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Jonas B, Heinze D, Schöll E, et al. Nonlinear down-conversion in a single quantum dot. arXiv:210512393. 2021.
Jonas, B., Heinze, D., Schöll, E., Kallert, P., Langer, T., Krehs, S., … Zrenner, A. (2021). Nonlinear down-conversion in a single quantum dot. ArXiv:2105.12393.
@article{Jonas_Heinze_Schöll_Kallert_Langer_Krehs_Widhalm_Jöns_Reuter_Schumacher_et al._2021, title={Nonlinear down-conversion in a single quantum dot}, journal={arXiv:2105.12393}, author={Jonas, B. and Heinze, D. and Schöll, E. and Kallert, P. and Langer, T. and Krehs, S. and Widhalm, A. and Jöns, K. D. and Reuter, D. and Schumacher, S. and et al.}, year={2021} }
Jonas, B., D. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, et al. “Nonlinear Down-Conversion in a Single Quantum Dot.” ArXiv:2105.12393, 2021.
B. Jonas et al., “Nonlinear down-conversion in a single quantum dot,” arXiv:2105.12393. 2021.
Jonas, B., et al. “Nonlinear Down-Conversion in a Single Quantum Dot.” ArXiv:2105.12393, 2021.
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