Optically driving the radiative Auger transition

Spinnler, Clemens and Zhai, Liang and Nguyen, Giang N. and Ritzmann, Julian and Wieck, Andreas D. and Ludwig, Arne and Javadi, Alisa and Reiter, Doris E. and Machnikowski, Pawel and Warburton, Richard J. and Loebl, Matthias C.. (2021) Optically driving the radiative Auger transition. Nature Communications, 12. p. 6575.

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In a radiative Auger process, optical decay leaves other carriers in excited states, resulting in weak red-shifted satellite peaks in the emission spectrum. The appearance of radiative Auger in the emission directly leads to the question if the process can be inverted: simultaneous photon absorption and electronic demotion. However, excitation of the radiative Auger transition has not been shown, neither on atoms nor on solid-state quantum emitters. Here, we demonstrate the optical driving of the radiative Auger transition, linking few-body Coulomb interactions and quantum optics. We perform our experiments on a trion in a semiconductor quantum dot, where the radiative Auger and the fundamental transition form a Λ-system. On driving both transitions simultaneously, we observe a reduction of the fluorescence signal by up to 70%. Our results suggest the possibility of turning resonance fluorescence on and off using radiative Auger as well as THz spectroscopy with optics close to the visible regime.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimental Physics (Warburton)
UniBasel Contributors:Warburton, Richard J
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Nature Publishing Group
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:02 Feb 2023 13:24
Deposited On:04 Mar 2022 13:13

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