Year: 2021
Type: article
Abstract: 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.
Source: Nature Communications
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $5,560
Funders: National Science Foundation, European Commission, Deutsche Forschungsgemeinschaft, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Bundesministerium für Bildung und Forschung, Horizon 2020 Framework Programme, National Center of Competence in Research Quantum Science and Technology
Awards: G1069678103, G1813044313, G1947753434, G3341840505, G434337789, G4385729107, Electro-optics of semiconductor nanostructures, G4873038753, G5562592858, Quantum Dots for Photonic Quantum Information Technologies, G6067730003, G628552264, G71801970, G757318250, Augerprozesse in selbstorganisierten Quantenpunkten, G7665909069, G7717224327, High-Fidelity Photonic Quantum Gates, Novel Quantum Emitters monolithically grown on Si, Ge and III-V substrates
OpenAlex ID: W3160967320