Optically driving the radiative Auger transition

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...

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Bibliographic Details
Published in:Nature communications 2021-11, Vol.12 (1), p.6575-6575, Article 6575
Main Authors: Spinnler, Clemens, Zhai, Liang, Nguyen, Giang N., Ritzmann, Julian, Wieck, Andreas D., Ludwig, Arne, Javadi, Alisa, Reiter, Doris E., Machnikowski, Paweł, Warburton, Richard J., Löbl, Matthias C.
Format: Article
Language:English
Subjects:
639/624/399/1017
639/766/400/482
Doppler effect
Electron states
Electrons
Emissions
Emitters
Fluorescence
Humanities and Social Sciences
multidisciplinary
Optics
Photon absorption
Quantum dots
Quantum optics
Red shift
Resonance fluorescence
Science
Science (multidisciplinary)
Solid state
Spectroscopy
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Summary: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. Radiative Auger is a process that leads to a red-shift of the optical emission of an atom or a charged solid-state quantum emitter. Here, the authors realize the inverse process by optically driving the radiative Auger transition of a short-lived electronic state in a semiconductor quantum dot.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-021-26875-8